tag:blogger.com,1999:blog-71501609558212692012024-02-08T03:34:00.845-08:00Techniques paintingPainting Boat, Air Brush, Color washing, home improvement, paint & glazing techniques free tutorials. Do it yourself home improvement tutorials, sponging, stippling, wood staining & silver leaf theory, color home improvement, glazing techniques paint canvas,watercolor instruction, watercolor painting, watercolor tips, watercolor workbooks, watercolor workshops, watercolor classesTechniques paintinghttp://www.blogger.com/profile/05702624504780605937noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-7150160955821269201.post-39274264571657756572007-07-08T20:31:00.001-07:002007-07-08T20:36:36.890-07:00Painting : Boat Paint - BootstripePainting Techniques.<br /><br /><a name="Bootstripe"><h1>Bootstripe</h1></a><br /><br />From Reggie on <a href="http://www.cruisingworld.com/new_forum.jsp">Cruising World message board</a>:<br /><br /><table bgcolor="lightyellow" border="1" cellpadding="3"><tr><td><font face="monospace"><br />As I see it you have two options.<br /><br /><br /><br />Quick and dirty - Buy yourself a quart of Interlux Brightside.<br />Dewax the surface with Interlux 202 solvent wash or equivalent solvent.<br />Mask the area off and sand the old stripe smooth with 220 grit paper.<br />Clean up and tack the surface and remask it with fineline tape<br />then apply two coats of Brightside using a good quality brush.<br /><br /><br /><br />Hard core Yachty way - Dewax the surface with Awl-Prep Plus wax<br />and grease remover. Mask off the area and sand it smooth ending<br />with 180 grit. Fair out any imperfections with Awl-Fair L.W. fairing compound.<br />Sand smooth to 220 grit, tack off, remask with fine line tape and<br />prime with Awlgrip high-build epoxy primer. Sand smooth<br />with 220-320 grit paper. Clean the area up, remask with fine<br />line tape, tack the surface off and then roll and tip on two<br />coats of Awlgrip 2-part linear polyurethane.<br /><br /><br /><br />The Brightsides will give you a finish that will last 3-4 years<br />before it starts to look rough. The Awlgrip finish will last 10<br />years or more and will look great.<br /></font></td></tr></table><br /><br /><br />From "Offshore Cruising Encyclopedia" by Steve and Linda Dashew:<br /><br /><table bgcolor="lightyellow" border="1" cellpadding="3"><tr><td><font face="monospace"><br />If you paint a straight bootstripe, it will look hogged; like it is drooping at the ends.<br />... If the stripe is 3" thick at the middle, I'd make it 6" at the bow and 4.5/5" at the stern.<br /></font></td></tr></table><br /><div class="blogger-post-footer">Techniques painting</div>Techniques paintinghttp://www.blogger.com/profile/05702624504780605937noreply@blogger.com11tag:blogger.com,1999:blog-7150160955821269201.post-87331065757850976212007-07-08T20:31:00.000-07:002007-07-08T20:35:00.520-07:00Painting : Boat Painting - InteriorPainting Techniques.<br /><br /><a name="Interior"><h1>Interior</h1></a><br /><br />From article by Don Casey :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />For interior wood brightwork:<br /><ul><br /><li>Oil gives warmth and beauty, is easy to apply, holds up reasonably well.<br /><br />But if not maintained regularly, it turns dark and ugly.</li><br /><br /><br /><li>Varnish is almost maintenance-free, doesn't harbor dirt or mildew, not stained by<br /><br />water, lasts a long time.<br /><br />But initial application requires more work.</li><br /><br /><br /><li>Applying varnish:<br /><ol><br /><li>Project adjacent surfaces with tape and sheeting.</li><br /><li>Remove cushions that might absorb sanding dust.</li><br /><li>If bare wood has dark spots or water stains:<br /><br />wash with detergent, rinse, bleach with oxalic-acid,<br />let dry, vacuum, rinse with borax, sand, vacuum.<br /><br />Don't use two-part wood-eating cleaners.</li><br /><li>If previously varnished: repair damaged areas by sanding and varnishing,<br />dry, sand with 220.</li><br /><li>If removing bad old finish, use heat gun and peel with sharp scraper.<br />No chemical stripper.</li><br /><li>Hand-sand, don't use power sander. Sand with the grain.</li><br /><li>Use polyurethane varnish, with foam brush, thin the first coat,<br />do most coats with gloss and last two coats with satin.</li><br /></ol><br /></li><br /></ul><br /><br /><br /><ul><br /><li>Always use paint with mildew inhibitor. Paint all inside surfaces,<br />and repaint every year or two, just to keep mildew away.</li><br /><br /><br /><li>Paint with interior latex housepaint (dries quickly,<br />and doesn't mildew, because it "breathes").</li><br /><br /><br /></ul><br /></span></td></tr></tbody></table><br /><br /><br /><br /><br /><br /><hr /><br /><hr /><br /><br /><a name="Bottom"><h1>Bottom</h1></a><br /><br /><b>Why paint the bottom ?</b><br /><table cellpadding="3" border="1"><tbody><tr><td><br /><ul><br /><li>Growth on bottom would slow the boat down.<br /><br />(But frequent diving underneath to scrub it off would control this.<br />And even if you paint, you'll still have to dive to<br />scrub off the propeller.)</li><br /><br /><br /><li>Some barnacles attach so firmly that they etch into the gelcoat.</li><br /></ul><br /></td></tr></tbody></table><br /><br /><br /><b>Types of bottom paint</b>:<br /><table cellpadding="3" border="1"><tbody><tr><td><br /><ul><br /><li>Biocide paints: release toxins (usually copper) that kill life:<br /><ul><br /><li>Ablative / soft / sloughing: somewhat water-soluble, so outer layer washes<br />off and exposes more biocide. Two types of ablative:<br /><ul><br /><li>Simple ablative.</li><br /><li>Co-polymer ablative: better control the rate of release.</li><br /></ul><br /></li><br /><li>Hard leaching: not water-soluble, so biocide leaches out at a fairly consistent<br /><br />rate.</li><br /></ul><br /></li><br /><li>Foul release paints: make surface so smooth and slippery that life can not attach to<br /><br />it.</li><br /></ul><br /><br />Any type may also have an anti-slime agent added to it, to kill soft growth that<br />would cover the surface and prevent exposure of the biocide.<br /></td></tr></tbody></table><br /><br /><br />From bottom paint test article :<br /><br />"This year's test, like those of recent years, shows no clear link between copper content<br />and effectiveness."<br /><br /><br /><br />Underwater metal needs priming before painting with anti-fouling.<br /><br /><br /><br />To determine type of bottom-paint on the hull, wipe dry hull with a wet cloth.<br />If lots of color comes off, it's soft/sloughing/ablative paint.<br /><br /><br /><br />Any type of paint requires sanding the old paint down until what is left is<br />solid and adhering well. You don't need to sand down to bare fiberglass/gelcoat,<br />maybe unless your old paint is ablative-type and your new paint will be hard-type.<br /><br /><br /><br />From bottom paint test article:<br /><br />[Caveats: a 5-month test, with no motion of water over the test panels:]<br /><br />"Less expensive paints without anti-slime additives held up just as well [as anti-slime<br /><br />paints]<br />in our testing."<br /><br /><br /><br />When the boat is hauled out, scrub the bottom <b>right away</b>;<br />the things growing on it will be much harder to remove once they dry out.<br />And if you're going to bottom-paint, scrub with something that<br />will sand/roughen the surface (bronze wool, brushes dipped in sand).<br /><br /><br />Lots of problems with Dolphinite Go Fast bottom paint;<br />comes off in sheets, or doesn't prevent major growth.<br /><br /><br />From Preston Gazaway :<br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />A quick and dirty way to determine the square footage<br />of your bottom is:<br /><br /><br /><br />0.75 x length x beam<br /></span></td></tr></tbody></table><br /><br /><br />If your old bottom-paint is adhering well, and you're putting<br />a compatible kind on top, don't do much sanding. Just rough<br />up the surface, and get rid of any loose or soft areas.<br />You certainly don't want to risk taking off<br />any gelcoat.<br /><br /><br /><br />Tips from Judy on "Quest":<br /><br />If putting on multiple coats, first edge with multiple layers of tape too. After applying<br /><br />each<br />coat, pull off one layer of tape. That way, you're not trying to tape next to a wet<br />edge of paint, and you're not pulling a layer of tape off from under several dry coats of<br /><br />paint.<br />Also, use a smaller roller; a very wide one is too heavy when loaded with heavy bottom<br /><br />paint.<br /><br /><br /><br /><b>Steps done to paint bottom when I was in the yard 1/2003</b>:<br /><table cellpadding="3" border="1"><tbody><tr><td><br /><ol><br /><li>Haul out.</li><br /><li>Pressure-wash.</li><br /><li>Put up on blocks.</li><br /><li>Immediately scrape any areas not hit by the pressure-washing, or not done well.</li><br /><li>Let dry for a day.</li><br /><li>Grind paint off any spots that need repair: gouges through<br />gelcoat or into laminate.</li><br /><li>Should have washed those spots, but I don't think we did.</li><br /><li>Apply repair filler to those spots.</li><br /><li>An hour after applying repair filler, apply bottom<br />paint to those spots, so filler and paint bond chemically.</li><br /><li>Let dry overnight.</li><br /><li>Scrape entire hull to get smooth, starting with<br />a big hoe-like scraper, then following with<br />a hand-scraper.</li><br /><li>Apply painter's tape to waterline stripe.</li><br /><li>Paint entire hull.</li><br /><li>Let dry overnight, or for a day.</li><br /><li>Launch.</li><br /></ol><br /></td></tr></tbody></table><br /><br /><br />From article by Don Casey in March 2004 issue of BoatU.S. magazine:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br /><ul><br /><li>Pressure-wash and scrape hard to see if base paint is loose and needs to be stripped.<br />If so, encourage pressure-washer to remove loose paint.</li><br /><br /><br /><li>If you do stripping, use marine stripper; non-marine can hurt gelcoat.</li><br /><br /><br /><li>Best to do some sanding even if base paint is solid. Avoids buildup that<br />leads to flaking.</li><br /><br /><br /><li>Stir bottom-paint very well; use a power-shaker if available.<br />Pour half into a mixing bucket for better mixing.<br />Get all copper up from the bottom of the can.<br />May take up to 15 minutes of hand-mixing, but don't skimp.</li><br /><br /><br /><li>Use thin-nap roller, and roll on in vertical stripes.<br />Stir the paint again before each time you pour more into the tray.</li><br /></ul><br /></span></td></tr></tbody></table><br /><br /><br /><b>Bottom-stripping</b>:<br /><table cellpadding="3" border="1"><tbody><tr><td><br />Bottom-paint stripper articles in 9/2000 and 11/2006 issues of <a href="http://www.practical-sailor.com/">Practical Sailor</a>.<br /><br /><br /><br />From George S on <a href="http://www.cruisingworld.com/new_forum.jsp">Cruising World<br /><br />message board</a>:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Peel versus Bead Blasting:<br /><br />I had my '85 Pearson 303 bead blasted last spring [2000].<br />It had all the original bottom coats and looked like a "Moonscape".<br />Two professionals did a good job right down to the bare gel coat - looked like<br />there was NO original barrier coat - just paint. They didn't overdo the blasting<br />and left remnants of paint without damaging the glass. However, the blasting<br />exposed a few hundred small voids (air bubbles) from the orig glass lay up of the hull.<br />These were NOT blisters, no trapped oil or gunk in the 1/32 - 1/16 inch sized holes.<br />I had to squeegee/fill the voids with Interlux watertite epoxy (good stuff for<br />sanding - not hard like Marine-Tex), then sand, fill, etc several times.<br />Then barrier coats + bottom paint, etc. Final verdict - The blasting cost me $650+<br />and a lot of additional work that I don't think I would have to do if I peeled it!!!<br />If I ever have to do it again, I would take the slower peel route and probably<br />do a better job in the end. The yards like the blasting 'cause it's faster - not better.<br /></span></td></tr></tbody></table><br /><br />From Les Blackwell on <a href="http://www.cruisingworld.com/new_forum.jsp">Cruising World<br /><br />message board</a>:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />I used Peel Away on my Hunter 35.5 and it was great.<br />It took several years of hard finished bottom paint right down to the fiberglass.<br />I bought a five gallon bucket of the stuff from West Marine for about $300.<br />But we had to buy more paper to cover -- they didn't provide enough paper for<br />the 35.5 hull size. However, we worked in cool northwest spring weather and left<br />it on overnight. Scraped off easily the next morning. I agree with Practical<br />Sailor -- it appears to be the best on the market at this time.<br /><br /><br /><br />Good luck on an unpleasant task.<br /></span></td></tr></tbody></table><br /><br />From Brendan Sullivan on <a href="http://www.cruisingworld.com/new_forum.jsp">Cruising<br /><br />World message board</a>:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />I stripped 24 years worth of bottom paint with PeelAway last spring.<br /><br /><br /><br />I tried both PeelAway marine strip products: PeelAway Marine Safety Strip and PeelAway<br /><br />Maine Strip II.<br />One was about $100 per five gallons and the other was $230 per five gallons.<br /><br /><br /><br />Each worked well; I almost think the less expensive one was better.<br /><br /><br /><br />You will need more paper than comes with the five gallon drum,<br />so be sure to pick that up ahead of time.<br /><br /><br /><br />I went through a five gallon container of each product (10 gallons total)<br />and could have used another gallon.<br /><br /><br /><br />The product is very temperature sensitive - the warmer the better.<br />I used it when nights dipped into the high 40's/low 50's and did not<br />get the full effect of the chemicals. If you can wait for the warmer<br />days/nights you will have better results.<br /><br /><br /><br />My technique was to apply it on a Friday evening then scrape on Saturday.<br /><br /><br /><br />One big mistake I made when using it was when I started to scrape<br />the paint off I tackled a large section - the paint was loose and it<br />left a watery residue. By the time I went back to wash down where I first<br />started scraping, the paint residue dried almost harder than before I started.<br />This meant more PeelAway! So I got smarter and worked on smaller sections<br />and washed off the paint residue before moving on to the next section.<br /><br /><br /><br />It is a very labor-intensive and time-consuming job. If I were to do it<br />all over again I would consider having the bottom sandblasted or professionally peeled.<br /><br /><br /><br />I figure with the peelaway materials, drop clothes, applicator brushes, etc<br />it cost me $500 plus three weekends to get a 26 foot Pearson with 24 years<br />of bottom paint down to bare gel-coat. It was my first boat project - so I<br />probably was a bit slower / less efficient than most people.<br /><br /><br /><br />Other tips:<br /><ul><br /><li>The more airtight and fewer air bubbles between paper and chemical the better.</li><br /><br /><br /><li>Paper comes in 3 feet by 6 feet sheets. I cut them in half.</li><br /><br /><br /><li>The more expensive product has a thicker consistency.<br />I applied it with a six inch paint scraper.</li><br /><br /><br /><li>The less expensive product I applied with a wide paint brush (cheap throw away<br /><br />kind).</li><br /><br /><br /><li>The thicker the coat the better it worked, but the more product needed.<br />Need to balance this with time and money constraints.</li><br /><br /><br /><li>I would plan on two applications, unless you do not have many layers of paint.</li><br /><br /><br /><li>A painters jump suit is a must - buy a couple for $10 each and throw away when<br /><br />done.</li><br /><br /><br /><li>The more expensive product will burn your skin if not washed off.<br />I learned this first hand - a dime size glob landed on my neck and I did not<br />realize it for an hour. Washed it off and was left with a nice red mark for a week.</li><br /><br /><br /></ul><br />Other tools required:<br /><ul><br /><li>Utility knife/razor blade to cut the paper and pop airholes.</li><br /><br /><br /><li>Buckets of water on hand to wash skin and tools.</li><br /><br /><br /><li>Roll of tape to help the paper stay on the boat in windy conditions.</li><br /><br /><br /><li>Drop cloths.</li><br /><br /><br /></ul><br /><a href="http://www.peelaway.com/">PeelAway web site</a> has all sorts of technical<br /><br />information.<br /><br /><br /><br />All in all, the bottom came out great!<br /></span></td></tr></tbody></table><br /><br />Peel-Away: stir it into a creamy consistency before applying.<br /><br /><br />From Jim on <a href="mailto:live-aboard-request@crux.astro.utoronto.ca">The Live-Aboard<br /><br />List</a>:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />I haven't used commercial stripper, I made my own and it worked well -- recipe<br />follows.<br /><br /><br /><br />First a warning -- Gloves and goggles are a must. This stuff is nasty and<br />will burn you or your clothing. Also air temp must be 50 degrees plus<br />(warmer is better).<br /><br /><br /><br />You need:<br /><br />1 can lye (supermarket)<br /><br />1 box cornstarch (supermarket)<br /><br />3 plastic buckets<br /><br />Misc. scrapers, rags, and clean up equipment<br /><br /><br /><br />To start -- add 1 can of lye to 1/2 bucket COLD water (basic Chemistry rule --<br />add the chemical to the water).<br /><br /><br /><br />Add the cornstarch to the other bucket 1/2 full of water; stir well.<br /><br /><br /><br />Slowly add the cornstarch mix to the lye mix with stirring until the mix is<br />about the thickness of pancake mix.<br /><br /><br /><br />Glob the mix on your bottom paint as thick as possible.<br /><br /><br /><br />Go get a cup of coffee, can of beer, nap.<br /><br /><br /><br />Come back in 1/2 hr and start scraping the loosened paint; dump the scrapings<br />in bucket #3 for proper disposal (bottom paint contains nasty stuff).<br /><br /><br /><br />It might be necessary to go around more than once. Finish with a green pad<br />cleaning thing, rags, and warm water. Flush the whole thing with water when<br />done several times.<br /></span></td></tr></tbody></table><br /><br />From Bob Johnson on <a href="mailto:live-aboard-request@crux.astro.utoronto.ca">The<br /><br />Live-Aboard List</a>:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />I tried this formula. It works well on bottom paint, not at all on epoxy. It<br />is slow acting so you have plenty of time to decide when it is "cooked"<br />enough. I ended up using Dolphinite, which I think used to be known as<br />Nutek. This stuff really works! Near as we couild figure it lifted/loosened<br />about 5 coats in one application. It is very expensive $280 / 5 gallons. I<br />ended up using about 25 gallons for a 37' tri. A word of warning - it<br />doesn't appear to care whether it is paint or fiberglass so you do have to<br />watch your times. 30 minutes was a minimum for me and in some areas close to<br />an hour. Application thickness of about 1/8" worked the best, anything less<br />resulted in a second application.<br /></span></td></tr></tbody></table><br /><br />From Gary on <a href="http://www.cruisingworld.com/new_forum.jsp">Cruising World message<br /><br />board</a>:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Be careful who you hire to do grit blasting. I've see 'professional' grit blasters,<br />who contracted with boatyard customers, blast all the way through the gel coat,<br />leaving a very porous surface to repair. I've also seen boatyards quickly paint<br />over those porous surfaces, with bottom paint, before the customers had an opportunity<br />to see what the blaster had done. I'm sure that such operators are a minority,<br />but it is probably a good idea to be aware.<br /></span></td></tr></tbody></table><br /><br /><br />From article in 11/2006 issue of <a href="http://www.practical-sailor.com/">Practical<br /><br />Sailor</a>:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br /><ul><br /><li>Ways of stripping bottom paint:<br /><ul><br /><li>Scraping.</li><br /><li>Wet sanding.</li><br /><li>Dry sanding.</li><br /><li>Sand blasting.</li><br /><li>Soda blasting.</li><br /><li>Chemical strippers.</li><br /><li>[Not mentioned:] Peeling.</li><br /></ul><br /></li><br /><br /><li>Even a chemical stripper touted as "green", environment-friendly, biodegradable, etc<br />produces hazmat sludge and runoff once it is mixed with the paint it is stripping off.<br />The waste must be protected-against and disposed of properly.</li><br /><br /><br /><li>In the test, <a href="http://www.franmar.com/">Franmar</a> Soy Strip got "best<br /><br />choice".</li><br /><li>Apply stripper starting at keel and working out toward waterline, to keep it<br />from dripping on you. Do scraping in same order.</li><br /><br /><br /><li>Read directions carefully and follow them; products have varying<br />characteristics, and leaving them on too long can let the sludge re-harden, or<br />can damage the gelcoat.</li><br /></ul><br /></span></td></tr></tbody></table><br /><br /><br />From Dave Evans on <a href="http://www.cruisingworld.com/new_forum.jsp">Cruising World<br /><br />message board</a>:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Soda Blasting:<br /><br /><br /><br />Like sand blasting, but using baking soda as the medium.<br />Much less abrasive than the usual stuff. Had it done on the Ranger 23 we previously owned.<br />Took the paint right off and left the gelcoat with a slightly-abraded surface,<br />perfect for the barrier coat.<br /><br /><br /><br />As someone else commented, it's all in the operator. They can leave paint on or<br />dig right down through to the glass. Be there and watch (and wear ear plugs).<br /></span></td></tr></tbody></table><br /><br /><br />From Johan de Bruin :<br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Re: sandblasting<br /><br /><br /><br />Dry / wet blasting remains the only effective choice for perhaps<br />METAL hulls. I assume you have a fiberglass hull, so the<br />following should apply.<br /><br /><br /><br />Blasting of ANY kind destroys the gelcoat integrity. The difference<br />between dry and wet is simply that wet takes longer for the<br />inevitable to happen. The net effect is to make the gelcoat porous,<br />and a porous hull WILL lead to blisters, even if you want to seal<br />the hull again after the blasting.<br /><br /><br /><br />Furthermore, the application of the wet blasting media needs to be<br />done at an exact angle. If the operator makes a mistake, they are<br />not likely to tell you and will remedy the result of their errors in<br />another method without advising you - human nature, that's all. <div></div></span></td></tr></tbody></table></td></tr></tbody><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div></table><div class="blogger-post-footer">Techniques painting</div>Techniques paintinghttp://www.blogger.com/profile/05702624504780605937noreply@blogger.com0tag:blogger.com,1999:blog-7150160955821269201.post-30918771900689531502007-07-08T19:47:00.002-07:002007-07-08T20:17:47.476-07:00Painting : How To Paint Boat : Exterior Paint<b>Exterior Teak Care</b>:<br /><table cellpadding="3" border="1"><tbody><tr><td><ul><li>From "Baba Sailboats Maintenance Tips":<br />"Always wash your teak decks across the<br />grain (not with the grain) with a soft sponge to<br />reduce the removal of wood between the wood grain.<br />The more wood that is removed between the grain,<br />the more it will hold water, causing deterioration<br />of the horizontal surface."</li><br /><li>From "Baba Sailboats Maintenance Tips":<br />"Remove spills on teak by covering the area<br />with dish detergent (Joy or Dawn) as soon as possible<br />after spill. Leave detergent on the spill about an<br />hour or so. Just before it dries, rinse it off."</li><li>Use talcum powder to soak up grease spots from raw teak.</li></ul><p>From John Bierrie<br /></p><p><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />... Teak decks require continual maintenance to keep from<br />developing problems. You need to keep a close eye on the caulking on a<br />routine basis, they should be rinsed down with salt water as often as<br />possible, daily is best, twice a day even better. If areas around the edges<br />of the boards or around bungs seem to stay a bit wet longer than the<br />surrounding areas (dark spots), then a problem exists in that area and you<br />need to take care of it, quickly. etc ... etc ... etc ... They need to be<br />washed from time to time to keep the wood doing what it does best, just<br />don't use a scrubbing brush ... They need sanding generally once a year,<br />maybe every other year, depending on how you want them to look, etc ...<br />Luckily, most people learn very quickly that trying to "finish" them is<br />more than just a waste of time, so they let them "age" naturally, but that<br />does not eliminate the required maintenance ... On the other side of the<br />coin, for all that attention / effort / sweating, you will end up doing, you<br />will have the most beautiful decks around ... Just don't walk on them in<br />bare feet in the hot summer sun, unless you just rinsed them down with salt<br />water ... :-)<br /></span></td></tr></tbody></table></p><p><br />From Colin Foster:<br /><br /></p><p><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Solid teak decks only need oil when you are trying to sell your<br />boat and want to impress the uninitiated. Otherwise they should<br />be allowed to get that grey weathered look that only requires<br />a daily wash with salt water for maintenance.<br />Veneer teak over FG may be another question.<br /></span></td></tr></tbody></table></p><p><br />From BobG on <a href="http://www.cruisingworld.com/new_forum.jsp">Cruising World message board</a>:<br /><br /></p><p><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />There's a problem with not oiling:<br />When you leave teak decks exposed to the sun for years on end,<br />without oiling them, the natural oils in the teak start to dry out.<br />Eventually, enough oil is lost to cause the wood to shrink and crack.<br />The soft pulp in the grain washes away and you are left<br />with ridges and cracks. There is a limit to how much sanding you<br />can do to smooth out the ruts. Replacing teak that has been worn<br />and sanded too thin is a very costly option. When the teak planks<br />shrink, it opens up gaps in the black caulking between the planks.<br />Fresh water can settle here, and eventually find its way under<br />the planking. You know what follows.<br /><br /><br /><br />You don't have to oil very often, but you shouldn't ignore it<br />altogether. Also avoid washing teak decks with any soap that<br />contains lye. The lye will eat away the soft pulp. Don't use a<br />stiff brush to scrub the teak as it too will destroy the soft pulp.<br />The best way to avoid these problems is to avoid having<br />a boat with teak decks.<br /></span></td></tr></tbody></table></p><p><br />From Colin Foster:<br /><br /></p><p><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />I have found that the white oxidized layer that develops on<br />teak exposed to the sun for long periods protects the wood<br />underneath just like the oxide on exposed aluminum.<br />I don't believe that the natural oils are lost because you<br />can take an old bleached piece of teak and sand off the<br />oxidized layer which is about 1/1000 inch thick and the<br />wood underneath is like new.<br /><br /><br /><br />This is based on personal experience, not a scientific test,<br />and I will retract my position if proved wrong.<br />Adding "teak" oil is only a very temporary change since<br />the surface oil rapidly evaporates if exposed to sun and<br />the natural bleached look returns. Teak is so dense that<br />not only are the natural oils retained but added oil has<br />little chance of penetrating, and if it does, then it is<br />into cavities from which it will just as easily evaporate in the sun.<br />I agree about avoiding all types of chemicals or soaps.<br />If you really have to clean the surface, I use a low<br />pressure, pressure washer with plain water.<br /><br /><br /><br />I like the rough finish produced by the softer wood<br />escaping from between the harder ridges - it is the<br />ultimate non-skid surface - and I think it is a crime to<br />keep sanding the hard ridges down to match the soft,<br />to retain a smooth surface.<br /></span></td></tr></tbody></table></p><p><br /><br />From Chuck McGohey:<br /><br /></p><p><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Wash your [teak] deck with saltwater and dishwashing liquid ... wood doesn't<br />like fresh water. I leave my deck bare ... oil will only darken the wood<br />and collect dirt ... and dark wood will get too hot to walk on barefoot in the summer.<br /></span></td></tr></tbody></table></p><p><br /><br />Summarized from "The Voyager's Handbook" by Beth Leonard:<br /><br /></p><p><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br /><ul><br /><li>Oil on exterior teak turns black.</li><br /><br /><br /><li>Teak oil doesn't keep in storage.</li><br /><br /><br /><li>Teak oil can rarely be found/purchased outside USA.</li><br /><br /><br /><li>Cover exterior teak with 8-10 light coats of varnish, topped by silver-gray paint.</li><br /></ul><br /></span></td></tr></tbody></table></p><p><br /><br />From Roy Miles:<br /><br /></p><p><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />> We have way too much exterior teak that we don't want to continue trying to maintain during the cruise. ...<br /><br /><br /><br />If you want nice, shiny teak, then sand and prep it, build up LOTS of coats of fresh varnish,<br />then apply one coat of WHITE paint or undercoat over it, protecting the base from ultraviolet<br />degradation. When doing normal maintenance you would sand the first coat of old varnish off,<br />anyway, so there IS NO ADDITIONAL WORK involved. When it's time to "show off",<br />sand the white stuff off with 180 grit, apply a "shine coat" of varnish,<br />and accept the compliments. Then, splash on another coat of white "cover coat" until<br />you feel compelled to flaunt your brightwork again. The white looks like it<br />belongs there (for most boats with basic white trim).<br /></span></td></tr></tbody></table></p><p><br /></p></td></tr></tbody></table><br /><br /><br /><b>Wood oils/glosses (Armada, Cetol)</b>:<br /><table cellpadding="3" border="1"><tbody><tr><td><br /><ul><br /><li>Before applying, make sure wood is absolutely dry.</li><br /><br /><br /></ul><br />From Norm:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />[Re: adding more coats of Armada every year:]<br /><br /><br /><br />The trick is to keep a sufficient thickness of Armada on to avoid exposing<br />the wood.<br /><br /><br /><br />We put ten coats on initially and this has held up very well for the past<br />three years except where it was rubbed off by some object such as a piling.<br />(we have no rub rail yet)<br /><br /><br /><br />Armada slowly disintegrates in the sun. Adding more is simply a matter of<br />washing with a mild Scotch Brite and water, then brushing on new Armada. We<br />have had no adhesion problems, overcoating has been trouble free.<br /><br /><br /><br />... The hard part is blending<br />the new with the old to avoid a blotchy appearance. I would guess, in<br />Florida at least, three coats a year would keep up.<br /></span></td></tr></tbody></table><br /><br />From David Elmer:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />... in my final prep after sanding, I first wiped the teak<br />with regular household bleach (which brought the color out<br />beautifully), let dry in the sun, then prior to the application<br />of the finish itself, did one last wipedown with acetone and<br />fifteen minutes or so later applied the Armada.<br /></span></td></tr></tbody></table><br /><br />From John Branch:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Varnish is absolutely beautiful but Sikkins Cetol looks great and is far<br />less labor intensive. After 3 initial coats 24 hours apart, one coat per<br />year is all you need. Approx $25/qt. but goes a long way. Practical<br />Sailor gave it a rating of number one for looks and durability a couple of<br />years ago but I'm not sure if its rating has changed. ...<br /></span></td></tr></tbody></table><br /><br />From Gary / Koshare:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Cetol is really easy to use and lasts very well. On my 72MOI41 I applied<br />five coats of cetol and 5 coats of cetol gloss over a year ago. It still<br />looks like I did it yesterday. Including all the teak in the sun every day.<br />In warm weather you can apply 2-3 coats of cetol a day. I've used cetol on<br />several boats and have never had a problem. One trick, frequently stir the<br />cetol (not gloss) when applying. It won't look orange when you're done.<br /></span></td></tr></tbody></table><br /><br />From Randy Stroschein:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />If you put finish on grey teak it will turn black. You need to get rid of<br />the grey; either sand it or use a teak cleaner (two-part cleaner is best,<br />but is harsh and hard on the teak. It will eat out the soft grain, requiring<br />you to sand a bunch anyway).<br /><br /><br /><br />My opinion is: Cetol, Cetol, Cetol, or if you like, Armada. The new Cetol Light has<br />done away with the orange coloration. Cetol (or Armada) simply can't be beat<br />for overall value: price/performance/prep required/maintenance/quality (ie<br />protection)/looks.<br /></span></td></tr></tbody></table><br /><br />From Joseph Berta:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Cetol is the way to go.<br />Try ammonia to get the gray out.<br />Easier on the teak than the two-part commercial cleaners and it won't stain<br />the FRP as you drip it everywhere.<br /></span></td></tr></tbody></table><br /><br />From Robert Block:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />We have some really high end teak furniture<br />on the patio which has been discolored by<br />grit grime and dirt. While not a boat<br />situation, nevertheless I will tell you<br />what did the clean up and restore trick<br />for us. On bare teak! Ready? Windex! Wet it down first<br />with water, then then spray with Windex and brush.<br />Rinse off. The effect should be immediate.<br />We follow this with one of the standard teak treatments.<br /><br />[Windex contains ammonia; just buying ammonia probably is cheaper.]<br /></span></td></tr></tbody></table><br /><br />Summarized from letter from Scott Steward :<br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Put down 4 coats of Cetol Marine, then 3 coats of Cetol Gloss, allowing<br />24 hours between coats. No sanding between coats; wipe with mineral<br />spirits to clean before applying next coat.<br /><br /><br /><br />Each year, sand lightly with 220-grit, then apply a fresh coat of Cetol Gloss.<br /></span></td></tr></tbody></table><br /><br /><br />From Ken:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />There is a known chemical incompatibility<br />between CETOL and Boat Life 2-part polysulfide caulk. The CETOL<br />when applied over the caulk eventually breaks it down. You end<br />up with a sticky mess, the caulk "bubbling" out of the seams<br />like tar on an old ship. Heat (hot days) seems to accelerate the problem.<br /></span></td></tr></tbody></table><br /><br /><br />Bristol Finish, from Edward Montesi:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />When I bought my M-383 last October, her Cetoled teak was a mess. About<br />50% was peeled off and the rest was cracked, brown and dull, a good<br />candidate for a "before-and-after" case study. The previous owner<br />advised me to power-wash off the remainder, which is one of the<br />advantages of Sikems by Cetol.<br /><br /><br /><br />That, right away, raised a red flag. That told me that #1 the adhesion<br />was poor, and #2 power-washing, if not done carefully, with just the<br />right pressure, can scour out the soft teak low, and leave the hard<br />grain high, requiring you to sand the high, hard grain down to the level<br />of the low. Every time you do this with the Cetol product, which appears<br />to be quite often, you wind up with a lot of thin teak, which was my<br />case, and my boat is only 18 years old.<br /><br /><br /><br />I chose the heat gun method of removal as least damaging to the teak<br />and, I must say, the Sikems came off rather easily, which, in my<br />opinion, was another nail in its coffin.<br /><br /><br /><br />The directions say five coats, minimum if you're starting from scratch.<br />Sounds like a lot but, you can re-coat after one hour and you don't have<br />to sand for up to 24 hours so, those coats can go on really fast. For<br />me, it took three days to do six coats. That was in October, when the<br />days are getting pretty short.<br /><br /><br /><br />Hints:<br /><br /><br /><br />#1 If outside, on bare wood, don't apply in the morning before<br />the sun heats up the wood or else the air inside the wood will expand<br />and create a mass of tiny bubbles on the surface. This stops after 3 or<br />4 coats. It's best to apply after the sun has reached its zenith when<br />the wood starts to cool down and the air inside the wood is contracting.<br />"Double-coating" within two hours of sundown will result in a cloudy<br />surface.<br /><br /><br /><br />#2 Round off all sharp edges as Bristol Finish tends to pull away<br />from sharp corners. Or, you can lay an extra brush stroke or two, let it<br />dry for a couple of seconds and go back and finish applying to the<br />adjacent flat surface. Remember, a generously radiused corner will<br />reflect a wider high-light than a sharp one and be more resistant to<br />wear and nicks. Looks professional too.<br /><br /><br /><br />A hint of how tough this catalyzed, acrylic-urethane is, is in the<br />removal of accidental drips beyond the masking tape. I've tried acetone,<br />paint remover, easy-off, and shaving with a razor-blade. It's very hard<br />to do without damaging the gel-coat. (I'll try heat next.) It's very<br />important to avoid drips or wipe them off immediately.<br /><br /><br /><br />#3 Occasional "fish-eyes" must be sanded and built up to the surrounding<br />level. Its high surface tension must, also, give it its remarkable<br />leveling and high gloss qualities.<br /><br /><br /><br />I told myself, 'If I'm going to put in this much effort, I'm going to<br />use the best looking, most durable product with the least maintenance<br />out there because, at my age and this quantity of teak, I'm going to do<br />this just once.' (I really can't knock Sikems. The condition and the<br />huge amount of teak may have lowered the price of the boat.)<br /><br /><br /><br />#4 Use a foam brush for the final coats, for you can put on a thin,<br />smooth coat on a hot surface without re-stroking back over it. Replace<br />the foam brush every 10 minutes as it swells and loses its stiffness.<br />Someone will come along with techniques that will make it even easier to<br />apply.<br /><br /><br /><br />In conclusion, there is only one Sikems job I've seen that was<br />acceptable and that was on a Sea-Ray with a thin toe rail and a little<br />teak on the anchor/bowsprit. He used mostly the clear coat. Most other<br />jobs I've seen, could have just as well been done with a cheap brown<br />paint.<br /><br /><br /><br />It's only been 8 months but the heavy traffic areas have stood up well.<br />(It's supposed to have 10 times the wear resistance and 100 times the UV<br />resistance of ordinary varnish). I've had to build up a sharp corner and<br />some small fish-eyes but, so far, so good. It's well worth the extra<br />cost, both in time saved in application and in longevity. The true<br />affirmation is the many, rave compliments the boat gets. Looking forward<br />to lots of varnish-free sailing.<br /></span></td></tr></tbody></table><br /><br /><br />From Robert Doty :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />The only negative comment that I've heard about Bristol Finish is that if you use it on an edge,<br />you'll start to get water underneath the Bristol Finish and it will start to separate<br />the teak from the varnish. When this happens to my regular varnish (I use Epifanes), I take the<br />damaged area down to bare teak and lay on new coats.<br /><br /><br /><br />The problem with Bristol Finish is that it's EXTREMELY tough to take off. You can't use a heat<br />gun with it, because the amount of heat you'd have to apply would damage the wood underneath. You<br />can't just scrape it off, either ... because it's super-tough. At least, that's what I've heard.<br />Basically, once you put the stuff on ... there's no easy way to get it off. This can be a major<br />problem if you damage the finish (with water intrusion as described above, or gouge it with an anchor,<br />or whatever).<br /><br /><br /><br />I talked with the president of Bristol Finish at the Miami Boat Show last month (he had a booth).<br />I listened to his pitch. He claims to live on a wooden sailboat in Ft. Lauderdale and has been<br />using his product for 10 years on his boat. He claims that it needs a simple sanding and two coats<br />every year. I told him about the objection that I'd heard about how difficult it is to remove, to<br />which he responded that if you maintain it right, you'll never have to remove it! This might be<br />true, but damage WILL occur to brightwork no matter how it's maintained ... things will happen that<br />are beyond your control. Therefore, you need a solution (in my opinion) that can be easily removed<br />and re-applied when necessary.<br /></span></td></tr></tbody></table><br /><br /><br />From Jim Mitchell :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />We've not used Bristol Finish on our boat, but did help a fellow out last year who<br />used it on his boat.<br /><br /><br /><br />Bristol looks very good, with a rich, deep, fast-building gloss - that's the<br />good news.<br /><br /><br /><br />The bad news is that it was an utter PITA to apply on a vertical surface,<br />because it's own weight would tend to make it sag and drag.<br /><br /><br /><br />On flat surfaces, BF's fast cure and tendency to rapidly form a surface film<br />really did work well and gave a good finish with minimal sanding. But on<br />verticals the uncured product would slough away under the surface film - it<br />was very frustrating to finish a bulkhead, and then watch the BF start<br />running and crazing 15 minutes later.<br /><br /><br /><br />The vertical bulkheads required us to thin to nearly 5:1 and apply many<br />coats to small areas. This process was as much - if not more - work than a<br />more traditional varnish, and I'm not in love with the end result which was<br />neither as deep or as glossy as the other surfaces.<br /><br /><br /><br />I'd use it for small vertical or horizontal/sloping surfaces but would<br />hesitate to do an entire doghouse in it.<br /><br /><br /><br />We're currently using a two-part Canadian varnish 'system' called Tuf Shield,<br />which is working very well and is proving to be as tough and tenacious as<br />the manufacturer claims. We're quite satisfied with the results, although it<br />would have been somewhat cheaper to have simply saturated Nonchalant in good<br />single-malt Scotch ...<br /></span></td></tr></tbody></table><br />From Susan Meckley:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />I tried Tuf-Shield ... what a disaster ... be sure it is what you want<br />cause you'll never get all of it off.<br /></span></td></tr></tbody></table><br />From Jim Mitchell:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Close to true, Tuf-shield is remarkably tenacious - the only thing worse to<br />remove is a European product called Coelam which will seal almost any deck,<br />but is a total PITA to remove. There is one product which will remove both<br />Tuf-Shield and Coelam without a major heat/scrape/sand session<br /></span></td></tr></tbody></table><br /><br /></td></tr></tbody></table><br /><br /><br /><br /><br /><br /><br /><hr /><br /><hr /><br /><br /><a name="Topside"><h1>Topside</h1></a><br /><br /><br /><b>Topside paint types</b>:<br /><ul><br /><li>Alkyd (aka "enamel"; oil-based):<br />cheap, easy to apply, lasts about a year.</li><br /><li>Modified alkyd (aka "one-part";<br />oil-based plus epoxy or polyurethane or silicone):<br />more expensive, more durable.</li><br /><li>One-part polyurethane.</li><br /><li>Two-part polyurethane coatings (cures with chemical<br />reaction and moisture, instead of drying):<br />expensive, tricky to apply, abrasion resistant,<br />won't flex, lasts several years. E.g. AwlGrip.</li><br /><li>Epoxy (normally two-part): very durable.</li><br /><li>Vinyl.</li><br /></ul><br /><br /><br /><br />Debatable, but:<br /><br />Dark-colored paint on hull/topsides is bad because:<br /><table cellpadding="3" border="1"><tbody><tr><td><br /><ul><br /><li>Heats up interior of boat in warm climates.</li><br /><li>Dark-colored paint fades faster than light-colored<br />paint (unless waxed often enough ?).</li><br /><li>Any flaws in the paint job are easier to see with a dark color than with a light color.</li><br /><li>Heating/cooling cycles cause expansion/contraction, which can<br />loosen hardware/joints, maybe even encourage delamination ?</li><br /><li>Boat is harder to see at night.</li><br /><li>Higher temperature can affect the hull's resin.</li><br /></ul><br /><br />From Douglas Heckrotte:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />I subscribe to Professional Boatbuilder. They say that the real problem is<br />that the increased heat will push the catalysis of the polyester a bit<br />farther along. This resin shrinks a bit and that's why you get print-through<br />of the fabric. This continued cure occurs even on decades-old boats.<br />Except aesthetic, it's no inherently serious issue.<br /><br /><br /><br />We've read about shrinkage of fillers; lots of the lighter weight fillers carry<br />that admonition against overpainting with dark colors.<br /></span></td></tr></tbody></table><br /><br />From Jeff M :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />I awlgripped my boat last winter and spent a lot of time considering a dark hull. For me, it was a<br />medium dark blue, but not the blue/black flag blue that you see a lot. I talked to a dozen dark<br />hull owners and a half dozen paint shops. One guy clarified the decision for me:<br /><br /><br /><br />He said there is only one reason to paint your boat blue: It looks good. All the other reasons are<br />against it. The paint costs more, it will show dirt and salt more, it is hotter, shows scuff marks<br />more, is more difficult to repair, and will show it's age sooner.<br /><br /><br /><br />Sigh. Maybe next time. I painted it white.<br /></span></td></tr></tbody></table><br /><br />From Steve D'Antonio:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />... Under the summer sun in Florida, a white hull may only reach 100 F to 110 F.<br />However, under the same conditions, a dark-colored hull can easily reach<br />180 F. In some fiberglass boats, the higher hull temperature can cause post-curing,<br />in which the resin in your hull cures further, revealing a fiberglass mat pattern that<br />was until then invisible. ...<br /></span></td></tr></tbody></table><br /><br /><br /></td></tr></tbody></table><br /><br /><br /><br />Paint on fiberglass should be a different shade than the gelcoat, so<br />when stripping the paint you can see where the paint stops and the<br />gelcoat starts.<br /><br /><br /><br />From Hap :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />I have used Brightside one-part polyurethane enamel for my dinghy.<br />It is easy to apply and it still shines a year later after<br />being in the Florida sun everyday.<br /><br /><br /><br />I painted my deck and coach roof with Interthane Plus<br />two-part polyurethane. It is more durable than the one-part<br />and longer lasting.<br /><br /><br /><br />To prepare the surface, I washed it down thoroughly with soap<br />and water, sanded it lightly and washed it again. Before applying<br />the paint I wiped the entire area down with acetone.<br /><br /><br /><br />Apply the paint with a fine textured 3 inch foam roller approved<br />for use with polyurethane paints. Tape off everything with 3M blue tape.<br />Two of us worked together while applying the paint. It is important<br />to keep a wet edge all the time and never try to go back over an<br />area that has started to dry. Leave retouches to the next coat.<br />Several light coats are better than a couple of heavy ones.<br />As you roll an area have your helper (if you have one) follow<br />behind with a good paint brush tipping the wet area to remove<br />fine bubbles left by the roller. You will want to use a flattening<br />agent in the paint to dull the finish as left to itself two-part<br />poly is so glossy you have to wear a welders mask to look at it. :-)<br /><br /><br /><br />It is important to start early in the day when there is no threat<br />of rain. It takes about 10 hours to cure and if moisture sets on it<br />the finish will be pitted and very dull. I had this happen with one<br />coat and I had to sand the whole thing to remove the pits ... it was<br />the pits. A heavy dew will do the same thing to the finish so plan<br />accordingly. When it is all done, however, it looks very good for a<br />do it yourself job and it cleans and wears very well. It should<br />last several years without further attention.<br /></span></td></tr></tbody></table><br /><br /><br />From Dave Gibson :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />I'm with the Interlux one-part polyurethane guys ...<br /><br /><br /><br />I've painted (or repainted) two boats with it.<br />A very good product for the do-it-yourselfer.<br /><br /><br /><br />Rather than roll-and-tip, you can also roll the paint on yourself,<br />maybe a three foot wide area on the hull, and then go over it<br />again with a very, very light touch on your foam roller to flatten<br />out the bubbles.<br /><br /><br /><br />I also found that thinning the paint a little helps it spread easier.<br /></span></td></tr></tbody></table><br /><br /><br />From Burry :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />I have used both Brightsides and Easypoxy and as far as ease of<br />application found them similar. The flow of these paints depend on<br />temp of surface, air and paint and also the relative humidity.<br />You want to adjust the thinner to allow easy flow so any brush strokes<br />blend into a smooth finish and yet not so much thinner that it promotes<br />running. As well, make sure you do a good job sanding and smoothing<br />the substrate as any imperfections will show through. I used a smooth<br />surface foam roller and a top quality china bristle brush with the<br />roll and tip method. There are also two-part paints available for the<br />do it yourselfer. The advantage to these are hardness and durability.<br />The disadvantage is cost, and difficulty in application. If you do<br />decide on a two-part suggest you look at hiring someone to spray<br />the finish coats for you. Check out the Interlux website as they<br />have a pretty good guide to painting with most of the tips and<br />suggestions being fairly generical and applicable to most boat paints.<br /></span></td></tr></tbody></table><br /><br /><br />About painting topsides, from Pierce :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Do it yourself ... This is one of the areas of highest<br />cost savings that you will experience.<br /><br /><br /><br />I have painted 1 topside in the past, and just finished my deck.<br />It came out real good. Just followed the directions and was very careful.<br />If you screw up, just keep painting, sand off the screw up and put on<br />another coat! Keep coating until you are happy with the results.<br /><br /><br /><br />Key tip: Put on VERY thin coats and more of them. Spread the paint out.<br />My first coat was too thick (got drips and sags) and the sanding time<br />before the next coat left me with a healthy respect for LOTS OF THIN COATS!<br />After the first coat, I got better and better and the last coat looked great!<br /></span></td></tr></tbody></table><br /><br /><br />About painting topsides, from Dave Gibson:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />I painted two boats with Interlux Brightsides and it came<br />out pretty good, if I do say so myself.<br /><br /><br /><br />The key to getting good results with Brightsides is to thin the paint<br />to match the weather. If the paint dries too quickly, you won't get the<br />smooth finish you want, and you'll get orange peel.<br /><br /><br /><br />I also invented my own technique for applying it. I don't use the<br />"roll and tip" method. I roll it on with a good quality<br />foam roller, covering about a three foot section of the hull.<br />I then go back to the previous three feet with the damp roller,<br />which is just starting to set up, and roll out all the bubbles.<br />The finish comes out pretty smooth.<br /><br /><br /><br />Cost for a previously painted 33' boat was about $300.<br />Cost for an unpainted 26' boat was about $500, due to all<br />the primers and prep work.<br /></span></td></tr></tbody></table><br /><br /><br />About painting deck, from Colin Foster :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Go with the two-part polyurethane. You will be disappointed with<br />the life of a one-part paint. The cost of the paint is small<br />compared to the preparation and labor of painting so go with the best.<br />Especially on a horizontal surface, the one-part will start to go<br />chalky in 6 months. Chipping or flaking will be more a function of<br />the surface under the paint rather than the paint itself but again,<br />the two-part paint is more tenacious at sticking together<br />and retaining a uniform surface.<br /><br /><br /><br />All the commercial boats go to the trouble of using two-part<br />paint - not particularily for appearance, but for durability.<br />A good two-part polyurethane can give at least two years service<br />in the direct sun on the deck and with touch-ups could last up to 5 years.<br /><br /><br /><br />You can apply it with a roller and it goes on very quickly.<br />If you are adding an anti-skid, it is VERY important to stir it<br />thoroughly and consistently before pouring paint into the<br />tray AND before loading the roller each time. I have found<br />it difficult to get an even distribution of the anti-skid grain<br />throughout the paint job, although it is more obvious to the<br />one who painted it than the casual observer.<br /></span></td></tr></tbody></table><br /><br />About painting deck, from Logan S/V Scotty Ann:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />We use paint made for patios and concrete driveways ourselves.<br />Works fine if you give it a good prep first and it is cheap<br />enough to redo when it gets grungy. Our decks are in daily<br />use rather than occasional use - so we expect it to need a<br />repaint when anchor chain rust and all the other good stuff<br />starts to make it look bad. Since maintenance is a daily<br />fact of life it just goes on the list and gets done.<br /></span></td></tr></tbody></table><br /><br /><br />About painting deck, and paint longevity,<br />from Al Hatch :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />I've used Brightside on a number of boats including my own.<br />I usually get 4+ years out of the walkways, longer on<br />cabinsides (glass boat), though if I want it looking<br />crisp I do the cabins every 2-3 years.<br /><br /><br /><br />Awlgrip will last a bit longer but is considerably more<br />expensive with a lot more prep work involved.<br /><br /><br /><br />In my experience if you have sanded and preped properly<br />Brightside will just fade, slow enough you may not notice<br />how much until you repaint one day. I have only seen it peel<br />and chip where the substrate wasn't properly preped and cleaned<br />before applying.<br /><br /><br /><br />If the gloss is too much for you then add flattening agent<br />to get a semi-gloss or even a flat. Personally the gloss is<br />easier to keep clean.<br /></span></td></tr></tbody></table><br /><br /><br />From John / Truelove:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Suggest you research the differences between Awlgrip, Awlgrip 2000, and "car<br />paint". We just went thru this, but decided to re-gelcoat the deck instead.<br />This due to the fact that any paint will last only apprx. 5 years in the<br />tropics, whereas gelcoat is good for twice that and more. Also, (the<br />original) Awlgrip, if needing repair, cannot be matched. If you're doing<br />topsides, use the Awlgrip 2000, and get a list of approved applicators from<br />the manufacturer. Another tip: don't use Oyster White. It has much less<br />solids and doesn't last anywhere near as long as other whites. When you<br />consider this and the fact that most every boat manufacturer uses Awlgrip<br />Oyster White because they get a better price, you'll know that Awlgrip,<br />therefore, sells much more paint for re-coat than they would otherwise.<br /></span></td></tr></tbody></table><br /><br /><br />About painting deck, from PaulK on <a href="http://www.cruisingworld.com/new_forum.jsp">Cruising World message board</a>:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />I tested Brightsides on a part of our foredeck and found it was easy to apply.<br />It did not stand up well to use, however, lasting less than a month or<br />so before starting to look shabby and worn. Not wanting to repaint every<br />year, (and re-tape, and re-mask, and re-sand) I went with International's<br />2-part stuff. They have a very helpful 800 number and were very patient<br />with my many queries. The deck has stood up to three years of heavy use<br />and still looks good, though there are a couple of spots that get chafed<br />by lines and are starting to wear through. The cormorants are a much<br />bigger problem than the deck paint.<br /></span></td></tr></tbody></table><br /><br /><br />Painting topsides, from JimJ :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Be careful! If you are anything of a perfectionist, don't bother!<br />I've seen lots of do-it-yourself jobs that look good in the correct light,<br />and I don't doubt that the people here have excellent looking paint jobs that<br />they did themselves. But I tried it on our boat and I was very disappointed.<br />(I read all the instructions, practiced my brush technique ... )<br />I ended up taking the boat to a pro to have awlgrip sprayed on - doing the prepwork<br />and labor myself saved lots of money and it was totally worth it in the end.<br />It is VERY hard to make a brushed (or roll and tipped) paint job look like anything<br />but a brushed (or roll and tipped) paint job. Most boats I've seen look great from<br />any normal distance - but that wasn't good enough for me. If I had to do it all over again,<br />I would have been happy with our gel coat for a few more years.<br /><br /><br /><br />Good luck - and practice on something that doesn't mean as much to you as your boat might!<br /></span></td></tr></tbody></table><br /><br />About painting topsides, again from Dave Gibson :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Painting is an easy do-it-yourself job.<br /><br /><br /><br />I used Interlux one-part polyurethane, and I've painted both my Pearson 26 and my Mistral.<br />The new Interlux isn't as good as the stuff made 10 years ago, and I needed to thin it.<br /><br /><br /><br />Proper preparation is very important, but I found that the<br />technique used to apply the paint even more so.<br /><br /><br /><br />The results of just brushing on Interlux is not good. The brush marks don't flow out good enough.<br />I also didn't like the results of roll-and-tip for the same reason.<br /><br /><br /><br />I found a technique that worked well for me on both boats. I used a good quality foam roller<br />and thinned the paint a bit. I then rolled on about a five or six foot wide section of hull,<br />followed by a second section. I then went back over the first section with a damp roller<br />(no paint on it) and flattened out all the bubbles. This gives a pretty smooth finish<br />with no brush strokes and no orange peel effect.<br /><br /><br /><br />I like the one-part polyurethane a lot. It's easy to apply, and easy to touch up.<br />I don't wax. I find that glass cleaner does a great job of cleaning the paint<br />and waxing isn't necessary. On the downside, it's pretty soft, and not as resistant<br />to scratches as the two-part epoxy, but the ease of maintenance is a fair trade off.<br /></span></td></tr></tbody></table><br /><br /><br />Dialog I had with Gary Elder about grinding and painting fiberglass top of my pilothouse:<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />> Just want to check with you on this (I've also<br /><br />> bought the WEST SYSTEM manual and have to read it):<br /><br /><br /><br />> 1- I've scraped off big chunks and sanded.<br /><br /><br /><br />Many experts think you should wipe with acetone BEFORE sanding. It has<br />to do with some epoxies having a wax in the resin that comes to the surface<br />during the curing process. I always do it that way, and have never had a<br />WEST SYSTEM project fail. If the wax is not removed before sanding, it just<br />gets smeared around.<br /><br /><br /><br />> 2- Fill in big divots with epoxy with filler added.<br /><br /><br /><br />Wipe the whole thing with acetone and clean rags just before applying<br />epoxy/filler.<br /><br /><br /><br />> 3- Sand to get everything fair.<br /><br /><br /><br />> 4- Do a "saturation" coat of epoxy.<br /><br /><br /><br />> 5- Sand lightly again.<br /><br /><br /><br />Very lightly.<br /><br /><br /><br />> 6- Do a "layering" coat of epoxy.<br /><br /><br /><br />> 7- Paint (with what ?).<br /><br /><br /><br />If you are going to do this alone, I would recommend either Brightside or<br />Easypoxy. Both are easy to use right out of the can, are very forgiving,<br />and will give you about five years of good service. You may have to thin<br />about 10% in this climate [south Florida]. If you want to get fancy, and try a two-part<br />polyurethane paint, I would recommend Sterling. It's similar to AwlGrip,<br />but easier to use, but for best results it's a two person job. One person<br />to roll it on, and another to 'tip it' with a good brush. I would avoid the<br />two-part paints for now.<br /><br /><br /><br />> Is this right ?<br /><br /><br /><br />Very close. In this climate, I would use the West 206 (slow) hardener.<br />You will probably get about a 30 minute pot life. The 205 (fast) hardener<br />will probably start to kick about 10 minutes after you mix it. I'm assuming<br />that you know about not putting the liquid resin/hardener mix in a 'tall'<br />container. Always use a container that gives you a large surface area<br />relative to the depth.<br /><br /><br /><br />Also, considering the surface area of this project, I would use a roller to<br />apply the resin, followed by a cheap paint brush to smooth it a little. The<br />brush will be junk after the first time you get it wet with epoxy.<br />Finally, once the epoxy starts to 'kick' there is no stopping it - kinda<br />like an orgasm - so work fast, but do a rehearsal first, just to make sure<br />you have all the tools, etc that you might want.<br /><br /><br /><br />> For 2 coats on approx 12x14 pilothouse top, seems that<br /><br />> I'll use a gallon of the WEST SYSTEM epoxy.<br /><br /><br /><br />You might want to phone the WEST SYSTEM people ... I'm wondering if such a<br />large surface should have a layer of glass in the lay-up to help keep the<br />epoxy from cracking.<br /></span></td></tr></tbody></table><br /><br /><br />Tips gleaned from "Topside Refinishing" article by Don Casey :<br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br /><ul><br /><li>Use two-part polyurethane, rolled on. You want one or two coats of primer,<br />then two top coats.</li><br /><br /><br /><li>Beam plus twice the length, times average freeboard,<br />gives approximation of topside surface area.</li><br /><br /><br /><li>Need primer, paint, reducer (thinner), dewax solvent,<br />filler to repair scratches, glazing putty to repair small flaws,<br />top-quality badger-hair brush for tipping, Fine Line (3M #218) masking tape, MEK.</li><br /><br /><br /><li>Steps:<br /><ol><br /><li>Wash hull with mixture of laundry detergent and bleach.</li><br /><li>Degrease hull with MEK.</li><br /><li>Wipe hull with dewax solvent to remove any silicone.</li><br /><li>If needed, remove vinyl graphics with Easy-Off oven cleaner [or<br />use a heat gun and peel off],<br />remove a painted-on name with a chemical stripper.</li><br /><li>Sand the hull. Hand-sand any special areas first, then power sand.</li><br /><li>Hose away sanding dust, and let dry.</li><br /><li>Fill any flaws, let filler dry, then sand and hose again.</li><br /><li>Wipe hull with dewax solvent again.</li><br /><li>Test gelcoat for porosity (brush thin coat of enamel on test area,<br />look for any pinholes). If porous, must prime. (If any "fish eyes",<br />apply dewax solvent again.) All repairs must be primed anyway.</li><br /><li>If previously painted, test old paint for adhesion to<br />gelcoat (try to rip some off with Scotch tape). Also<br />test for compatibility by seeing if reducer (thinner) softens it.<br />If either test fails, must strip off the old paint.</li><br /><li>Tape off borders.</li><br /><li>On all painting days, must have low humidity and moderate temperature.<br />Also need calm day, and want to avoid direct sunlight.</li><br /><li>Paint with primer.</li><br /><li>Let primer cure, remove masking tape, then sand.</li><br /><li>Fill blemishes with glazing putty, let dry, then sand and maybe reprime.</li><br /><li>Tape off borders.</li><br /><li>Wipe with reducer (thinner).</li><br /><li>Mix paint, add thinner, test on a piece of Formica to see if<br />thinning is right (brush strokes should fade out, paint shouldn't sag).</li><br /><li>Paint. Best if done by two people, one rolling and other tipping.<br />Consider doing just transom first, to get technique right.<br />Want to paint as fast as possible. Don't pause, even for a minute.</li><br /><li>Let first coat cure overnight.</li><br /><li>Wet-sand with 320-grit to correct surface flaws.</li><br /><li>Hose and then sponge-scrub to remove sanding scum, and let dry.</li><br /><li>Wipe with reducer (thinner).</li><br /><li>Apply second coat.</li><br /><li>Let second coat cure.</li><br /><li>Not necessary to apply third coat, unless some significant<br />problem with second coat.</li><br /></ol><br /></li><br /></ul><br /></span></td></tr></tbody></table><br /><br /><br />From Russ Buckingham :<br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Re: two-part paint that can be used on decks:<br /><br /><br /><br />There are several two-part finishes out there. The one we are using on our<br />boat is an industrial product called -- aliphatic urethane. It's a 4 to<br />1 mix, flows out incredibly nicely. High chemical resistance, high gloss,<br />long retention. They say no waxing for 10 years!!!<br />Definitely a top-notch finish, without the price of "Marine" coatings.<br />Find a paint dealer that does industrial coatings.<br />Another tidbit: use a pin roller for following roller application. It<br />breaks the tiny air bubbles. Nice finish.<br /></span></td></tr></tbody></table><br /><br /><br />From PaulK :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Re: Preparing a deck for painting:<br /><br /><br /><br />Do it inside a building - weather outdoors doubled the time it took me.<br /><br /><br /><br />Another suggestion - mask everything, everywhere, all over.<br />I thought I'd be "careful" around the winches, etc,<br />and am still trying to remove little spots, smudges<br />and drips four years later. I spent the better part of<br />a day masking, and got tired of it. Would have been<br />better off spending two days masking.<br /><br /><br /><br />Also hope you're<br />using two-part poly, since you don't want to have to do<br />it again any time soon. (Ours is now starting to wear<br />in spots after 4 years.) Other single polyurethane paints<br />we tested on our actual deck and on our Blue Jay deck<br />simply didn't stand up for more than a season.<br /><br /><br /><br />For nonskid, we used less than the max amount suggested<br />by Interlux, and it is not as aggressive as we'd like.<br /><br /><br /><br />Take your time and do it right. It looks great when you're done.<br /></span></td></tr></tbody></table><br /><br /><br />One data point: a family of four sanded and painted hull and deck of 44-footer with LP:<br /><br />Took 6 weeks, 600 hours of labor, hired professional to spray for $400,<br />total cost $2500, boat looks like new.<br /><br /><br /><br />From sailormike01 :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />I paint 4 to 5 boats a year and the best advice I can give is go with an acrylic urethane.<br /><br /><br /><br />Polyurethane paints (i.e. Awl-grip) are excellent high-quality paints that require almost no<br />maintenance, but they cannot be sanded and buffed without leaving a "halo" that is duller than the<br />rest of the boat. So if you end up with too much orange peel or a couple of nasty runs, you would<br />be better of re-spraying the whole boat which gets real expensive. It takes lots of practice to<br />get it right the first time with polyurethane.<br /><br /><br /><br />Acrylic urethane (i.e. Awl-craft 2000 or imron) is much more forgiving, it can be sanded and<br />buffed without losing gloss, therefore much easier to repair scratches later on. But it does<br />require a little maintenance (buff and wax every 1-2 years). You can also get rid of runs and<br />orange peel by sanding with 1200 grit up to 2000 wet then buffing with a high quality compound to<br />get that high gloss wet look it sounds like you are looking for.<br /></span></td></tr></tbody></table><br /><br /><br />From slosurfin :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Another issue with Polyurethanes is getting the right mix of thinner etc. It's not an easy<br />do-it-yourself product. I have been using 4" wide foam rollers, they're a dense, white foam, they work<br />great and lay down a nice finish, you'll see a little stipple up close but even that is minimal.<br />Prep, prep and more prep are as important as anything, the paint layer is soooo thin that prep is<br />probably the most important part of the job. Use a sanding primer, a couple coats sanding between<br />goes a long way as well.<br /></span></td></tr></tbody></table><br /><br /><br />From sailormike01 :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Acrylics are not good products for rolling. Even with the slowest solvents they still flash (dry)<br />too fast and won't flow, or level out.<br /><br /><br /><br />For roller apps, the poly is the better way to go, and with the right mix of solvent and a little<br />practice you can get a pretty nice finish.<br /><br /><br /><br />I am a big fan of Awl-grip (poly) and Awl-craft 2000 (acrylic). You can get an application guide<br />through west marine, it is very specific and easy to understand. Awl-grip also has a great tech<br />support dept.<br /></span></td></tr></tbody></table><br /><br /><br />From Tom Young :<br /><br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Awlgrip removal ... a fate worse than death.<br /><br /><br /><br />In comparison, I have fond memories of pulling a diesel and replacing it in one of my boats,<br />and I had a broken arm at the time.<br /><br /><br /><br />When I get bogged down with springtime projects that need to be done,<br />I pull up a few pictures of removing Awlgrip a few years ago from my hull.<br />That was the worst project I have ever had to do on a boat.<br /><br /><br /><br />[Message had a picture that looked like doing a "bottom peel" job.]<br /></span></td></tr></tbody></table><br /><br /><br />From topside paint test article :<br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br /><ul><br /><li>Best brand of paint varies by <b>color</b> of the paint.</li><br /><li>Some colors of Rust-Oleum got good ratings.</li><br /><li>Boatyards might charge $150 per foot for topside painting.</li><br /></ul><br /></span></td></tr></tbody></table><br /><br /><br />From letter from Brian Cleverly :<br /><table cellpadding="3" border="1" style="color:lightyellow;"><tbody><tr><td><span style="font-family:monospace;"><br />Some topside paints are incompatible with some caulks and sealants.<br /><br /><br /><br />Interlux Toplac over West Marine Multi-Caulk (poly-ether), 3M 101 (polysulfide), or Boatlife Life-Caulk<br />had problems. The paint softened the caulk, and the paint cured very slowly and never reached normal hardness.<br /><br /><br /><br />Toplac over 5200 (polyurethane) or Boatlife Life-Seal (polyurethane) didn't have problems.<br /></span></td></tr></tbody></table><br /><br /><br /><br /><br /><br /><br /><br /><hr /><br /><hr /><br /><br /></span></td></tr></tbody><br /><br /><br /></td></tr></tbody><div class="blogger-post-footer">Techniques painting</div>Techniques paintinghttp://www.blogger.com/profile/05702624504780605937noreply@blogger.com0tag:blogger.com,1999:blog-7150160955821269201.post-2503187425643682042007-07-08T19:47:00.001-07:002007-07-08T19:59:08.006-07:00Painting : How to Paint Boat - Exterior WoodTypes of wood finishes:<br />Paint.<br />Varnish (paint without pigments).<br />Oil (Cetol, Armada ?).<br />Acrylic urethanes (Bristol Finish, Honey Teak). Oils and varnish, from "Coating With Oil" article by Bob Flexner in Workbench magazine Feb/Mar 1992:<br /><br />These all are marketed as "oils":<br />Straight oils (tung or raw linseed or boiled linseed).These are "curing" oils; they change to a solid in air.They are fairly soft after curing; you can dig a fingernail into them.Many coats to get a satin sheen.<br /><br />Polymerized (heat-bodied) oils.Builds a hard, glossy film. Expensive and rare. E.g. gunstock finish.<br />Wiping varnishes: varnish thinned with mineral spirits.Often sold as "oil" or "Somebody's Tung Oil" or "Somebody's Tung Oil Varnish".Hard when cured. Cures glossy.<br />Oil-varnish blends: a mixture of straight oil and varnish.Often sold as "Somebody's Oil".Soft when cured; wrinkles if cured thick.Satin sheen after one or two coats.Varnish is made by cooking a curing oil with a hard resin (usually synthetic alkyd, phenolic or polyurethane) to make a new substance that cures fast to a hard, glossy film.<br /><br />The protection any finish film gives depends largely on its thickness. The first coat is the only one that penetrates into the wood. Depth of penetration is controlled entirely by curing time, not by rubbing; rubbing actually makes it cure faster. Varnishing wood:<br /><br />Types of varnish:<br />Alkyd resin: very pale, clear, doesn't yellow, but not lustrous.<br />Phenolic resin: deep luster, darkens and yellows on drying, excellent durability.<br />Polyurethane resin: paler than phenolic, ages better, extremely hard and durable, can be applied in very hot conditions. Want varnish that contains UV protection.Ways to strip varnish from wood: sanding, chemicals, heat gun<br /><br /><br />From Jeff M on Cruising World message board:<br />... Sanding to remove varnish on large areas is not recommended; use chemicals or a heat gun. ... The heat gun is a great idea, especially for long flat runs. I caution against waiting for the varnish to bubble though. Not very long after bubbling is burning, and if it is your first time, you have a large chance of burning the wood. (If you think your moisture-blackened mahogany looks bad now, try charring it.)<br /><br />I recommend holding the heat gun in one hand, and the scraper in the other. Warm the varnish over a 1 foot area and keep test scraping every 15 seconds. You will feel the varnish soften, long before it bubbles. As it gets warm enough, it will peel off easily with a soft rubbery texture. The older the varnish, the more heat rquired. Keep the heat gun moving. Don't wait for all of the surface to bubble. Just a few bubbles indicates very soft varnish - scrape it off, and heat what's left.<br /><br />Use a sharp scraper. If the scraper doesn't take nice paper-thin curls of unheated varnish, your scraper is too dull. If the scraper tears at the bare wood, reverse direction, scrape the other way. Always scrape with the grain. ...<br /><br /><br />From Dan on Cruising World message board:<br />Heat gun and 1" red devil scraper to remove varnish. Soften the varnish and it scrapes right off. Follow with light sanding to smooth out. Make sure that you keep a honing stone close at hand and use it frequently to keep the blade very sharp. Summarized from "Building Your Dream Boat" by Charles E. Wood:<br /><br />Make a "tack rag" to use after sanding and wiping, just before varnishing:Take a cotton cloth, dip it in warm water, wring out, sprinkle with turpentine, rub gently, shake out excess, sprinkle with a little varnish, wring out, shake out excess, let cloth dry for half hour.Store in a closed container.Renew by sprinkling with water and a few drops of turpentine and varnish. Use deglossing fluid to remove sanding dust ???How to varnish, summarized from "Building Your Dream Boat" by Charles E. Wood:<br /><br />Varnish on warm, mostly windless days.<br />Prepare surface well. Wipe with a "tack rag".<br />Don't stir or shake the can.<br />First coat should be thinned.<br />Work from unfinished area to finished area.<br />Use as few strokes as possible.<br />Stroke in one direction.<br />Don't apply too heavy; it will sag or run.<br />Sand lightly between coats, and wipe with a "tack rag".<br /><br /><br />From Charlie / Bliss :<br />... I went to a Behr spar varnish - 3 coats on the exterior teak, two on the interior. Looks great and has held up well. About every three months I lightly sand with one of those foam sandpaper pads and reapply - it takes me about two hours total. I know that to some of you this sounds like a lot of work, but it really is not - I guarantee you that I am one of the laziest boat guys at the marina.<br /><br />I learned my lesson in choice of brushes, though. At first I was using those 69 cent throwaways, bu the varnish looks a thousand times better when I use a 7 dollar top of the line brush. Only trouble is the cleaning afterwards. About varnishing with partial batches, from Colin Foster on Cruising World message board:<br /><br />I use the clear two-part awlgrip polyurethane for varnishing so I often need small batches from larger containers. It makes a long lasting, hard surface brightwork job with just 3 coats, but it doesn't go well over conventional varnish - it has a tendency to bubble. It may not look as good as a fresh conventional varnish job but averaged over the 2 years (or more) I go between refinishing, the AVERAGE appearance over the period is far superior.<br /><br />The polyurethane mixing ratios are usually not 1:1 so you need to take a tongue depressor type stirrer and mark the depth on it that you think you need - (which can only come from experience) - with a ball point pen. Divide the space below it with a second line in the ratio of the mix, and add a third line above it for the 10% or ?% of brushing thinner that you need. Since it always runs out when you have just a little more to do, the extra % from the thinner will get you through the job (Yeah, right).<br /><br />In really hot weather I give the mix a head start by cooling the components in the refrigerator before dispensing, and avoid leaving the mix in the sun while using it. Pour each of the components in slowly to avoid bubbles so each reaches the next mark on the stirrer held vertically in your mixing pail. Have paper towels handy and wipe the screw tops and caps very thoroughly before replacing them. Then stir gently but thoroughly.<br /><br />The manufacturers say to wait 15 minutes after mixing before using and although I usually do this, however I have not had any problems when I skipped it. When painting with a brush, draw paint from one side of the container, but wipe the brush out on the other side so the bubbles have to traverse the width before getting to your brush.<br /><br /><br />From article by Tom and Vicky Jackson in 4/2004 issue of Cruising World magazine:<br />Hard finishes last longer, but are more susceptible to cracking from movement, and more likely to lose adhesion if dampness gets under. Soft finishes are beautiful and flexible and more tolerant of movement and dampness, but wear more easily and are more vulnerable to UV and frost.<br /><br />Two-part products: hardest and toughest finishes, but hard to work with. One-part polyurethanes: tough finish and easy to apply, but require many coats, and peel off from dampness. Synthetics (Cetol, WoodPro, etc) are easy to use, but require many coats and often impose their own color. Modern traditional varnishes (Epifanes, etc) are easy to apply and build well.<br /><br />True traditional varnishes are soft and easily damaged. Oil finishes are easy to apply but don't build (so don't last) and often alter the color of the wood.<br />Always wet-sand; less messy, and won't get floating duct landing on wet varnish later.<br />Within reason, quantity and frequency of applications are more important than quality. Build thickness; don't worry about perfection.<br /><br />In general, don't try to keep horizontal surfaces varnished; traffic, sun and damp abuse them.<br />Aim for 9 or 10 coats. Lots of thinner in the first coats. Wet-sand between sets of three coats.<br />A quick coat at the end of the season protects during the off-season.<br />Varnish while in the water: little dust around. Avoid windy days. Avoid very hot days (if you can't, thin even top coats). Don't apply in damp air.<br /><br />Do the job quickly, using a reasonably big brush, keeping a wet edge.<br />Keep air out of the container before closing it up. Maybe add well-cleaned pebbles to displace air.<div class="blogger-post-footer">Techniques painting</div>Techniques paintinghttp://www.blogger.com/profile/05702624504780605937noreply@blogger.com0tag:blogger.com,1999:blog-7150160955821269201.post-78251024865422255192007-07-08T19:47:00.000-07:002007-07-08T19:52:14.454-07:00Painting : How to paint Boat - GeneralWhen selecting a paint, also get the primer and thinner made by or specified by the paint manufacturer. Improper combinations can mean disaster.<br /><br />When painting, protect mounted hardware by coating it with petroleum jelly.<br />Peel masking tape off ASAP after painting; the longer it stays on the harder it is to get off.<br />To remove paint/varnish spilled on gelcoat, or a painted-on boat name, use Easy-Off oven cleaner (fume-free cold oven formula). Spray on and let set for a few minutes. For long-dry paint, may require several applications.<br /><br />Good paint stripper: Xtra Strength CitrusStrip (try Home Depot). Use very stiff nylon brush.<br />Solvent/cleaner: sometimes can use white vinegar or denatured alcohol, which are safer than acetone.<br /><br />Solvents: don't apply with printed paper towels (use plain) or rags with fabric softener or dyes; surface will be contaminated. Use white lint-free cotton (bed sheets).<br /><br />Roll-and-tip: painting technique where you use a roller to roll on a thin layer of paint, then follow up immediately with the tip of an unloaded brush to lightly smooth the surface and eliminate any bubbles. Best done by two people, always keeping a wet edge, working fast.Practice on scrap or a dinghy or the transom before doing the hull.Practice on primer coats and under coats, too.<br /><br />Keep a record in the log of what type of paint you used for each job. Write it down before opening the can and getting paint all over the label. Logging the info will help you get the same good paint again later, avoid the same bad paint later, match colors, cover with compatible paint later, know what stripper to use later, etc.<br /><br />Paint or varnish in cool, damp weather instead of the recommended warm, dry weather. Coolness gives the paint more time to "lay down" (spread evenly), and gives you more time to correct problems. Dampness keeps down dust and bugs. But if you're covering porous wood and the temperature rises, you can get bubbling.<div class="blogger-post-footer">Techniques painting</div>Techniques paintinghttp://www.blogger.com/profile/05702624504780605937noreply@blogger.com0