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Painting with Marine Polyurethanes

Should a mono-urethane or two-part linear polyurethane LPU be used? Practical Sailor is often asked these questions. Our polyirethane That depends on the painter and the paint. With the right tools, research, and enough time and 2 part polyurethane paint for boats mini, any boat project is a manageable do-it-yourself endeavor.

However, most of us lack the tools, time, and know-how to tackle all of the repairs and maintenance our boats require.

The key is to only take on those projects that most realistically match our polyurethand, budget, and schedule. So when it came time to freshen up the topsides of our long-neglected Catalina 22, Jellywe weighed the pros and cons of doing it ourselves versus paying a yard to spray on some Awlgrip. Our duty to answer our readers oft-asked questions and our addiction to product testing-and perhaps an underlying masochistic tendency-won out, and we decided to mount an amateur encounter of the polyurethane kind.

The mission was neither swift nor painless, but in the end, Jelly shined with a glossy 2 Part Polyurethane Paint For Boats Novel new paint job, pqint tucked another project under our DIY toolbelts, 2 part polyurethane paint for boats mini our readers hopefully will benefit from 2 part polyurethane paint for boats mini hard-learned lessons. While our panel test Practical Sailor August seeks out the most durable topside paint, this Jelly test was to determine which two-part LPU is the polyureghane user-friendly for the amateur bats and whether the project is manageable for the average do-it-yourselfer.

That in turn meant settling polyurethsne a less-than-perfect finish, but it 2 part polyurethane paint for boats mini ensured a true test of the products and techniques user-friendliness.

We chose to use the roll-and-tip painting method. It is less hazardous and requires less skill than spraying on the paint, but it does call for more deftness pzint brushing.

Testers selected two-part polyurethanes from manufacturers that historically have done well in Practical Sailor s topside paint durability tests: Interlux and Epifanes. While Interluxs Perfection was released after our last test, its predecessor, Interthane Plus, took top honors for two-part white polyurethanes, and Epifanes Poly-urethane was named the best red or blue LPU in our four-year test published in the May issue.

On Jelly s port side, we fof Epifanes Poly-urethane No. Both paints can be sprayed on, but different thinners are required. We also tested several fairing compounds, natural-bristle boars, high-density foam rollers, and two-part epoxy primers.

See page 29 for more on primers and preparation techniques, and look for reports on our brush and fairing compounds test in upcoming issues. Before getting started on any first-time boat project, its a good idea 2 Part Polyurethane Paint For Boats Model to do some homework. We browsed paint manufacturers websites and marketing literature for instructions and any helpful advice. And we raided the Practical Sailor archives for past tests and how-tos.

April 1, ; Feb. Thenever-painted Jelly was in pretty sad shape. Hull shine was long gone. Her gelcoat was crazed in places; bare fiberglass showed through in other spots, and others still had deep gauges, pin holes, and scratches. To properly prepare the hull for painting, much sanding, filling, and fairing was required, as were multiple coats of primer. We followed makers instructions for surface preparation, priming, and application.

The starboard side was primed with two coats of two-part Interlux Epoxy Primekote, and on the port hull, we applied two coats of Epifanes Epoxy Primer. After priming, testers used blue dye to find any areas that were uneven and then sanded the hull with grit sandpaper and a pneumatic dual-action sander DA.

After wiping down the hull with maker-specified solvents and tack a rag, it was time to apply the LPU paints. Three coats of each product were rolled foe using high-density, closed-cell foam sausage rollers and tipped with 3-inch Wooster and Epifanes Omega natural-bristle brushes.

Testers wet-sanded between coats with grit sandpaper, and wiped down with Interlux and Epifanes thinner. For most, two coats would suffice, but Murphys Law, uncooperative Florida weather, and amateur mistakes led to Jelly getting a third coat on each.

To determine which DIY topside makeover system was more 2 part polyurethane paint for boats mini, testers rated the products on the following criteria: how easy the product was to lay on, how forgiving it was, maker-supplied instructions, finish hardness, and initial gloss. For select jobs, you may find that one coat of Epifanes Primer covers well enough, but in our opinion, two coats of the Interlux Epoxy Primekote will always be necessary.

When it came to hand-sanding between coats, the 2 part polyurethane paint for boats mini primer, like its LPU, was much harder to sand than the Interlux, but it also left a harder finish-a bonus for durability but a drawback during application.

There was a noticeable difference in the workability of the LPU paints. The Epifanes Poly-urethane had a tendency to dry much quicker than the Interlux, making it hard to keep a wet edge and easy to leave holidays. Adding thinner dropped the viscosity too. Both paints pulled together well as they cured, but the Perfection seemed more forgiving, in our opinion. In some spots on the Epifanes side, the brush strokes never pulled.

Admittedly, this may have been an application hiccup, but the goal here 2 part polyurethane paint for boats mini to identify the most amateur-friendly coating. Both paints offered acceptable gloss, not exactly a slick, sprayed-on shine, but better than expected. Reflection tests showed Epifanes Poly-urethane to have the upper hand in gloss ratings. See photos, page The difficulty testers had in sanding the Epifanes primer and LPU is a testament to its hardness.

Epifanes does offer detailed instructions, but we prefer Interluxs idiot-proof approach with spelled-out, step-by-step directions on the cans and downloadable information, including how-to videos, on its website. Epifanes offers limited application tips online. The Jelly topside project was not without its stumbles, but rather than recount all the things that went wrong, we offer this brief rundown of knowledge gleaned from the experience.

Prep brushes and rollers by going over them with tape to remove lint, fuzz, and stray bristles. Clean brushes immediately after finishing a coat. Be aware of the weather: Do not paint in the direct sun, and if you live south of the Mason-Dixon, buy plenty of thinner.

As the humidity climbs, so will the paints thirst for thinner. Keep an extra clean brush and extra paint on hand in case one brush gets dropped or paint spills during application.

Wet the ground around the boat to keep dust. Try vertical and horizontal tipping. For Perfection, Interlux recommends rolling vertically and tipping vertically, but we had better success rolling vertically and miji horizontally. Also, look for it with the online version of this article at www.

Its more forgiving than its Epifanes counterpart, and idiot-proof instructions are easy to come by. Epifanes Poly-urethane, 2 part polyurethane paint for boats mini harder, glossier finish, is worth considering for the more advanced painter or for those hiring a pro. Is the super-slick look of a professional, sprayed-on Awlgrip job achievable for the 2 part polyurethane paint for boats mini with a roller and paint brush?

Not without a fair amount of practice at roll-and-tipping bboats experimenting with flow. If a mirror-reflection is the look you want, hire a pro. DIY topside painting is a feasible project with the right product, but we do recommend practicing on a fiberglass dinghy, rudder, or piece of glass before touching your hull.

All 2 part polyurethane paint for boats mini, the projects two testers 2 part polyurethane paint for boats mini about 60 hours prepping, priming, and painting. So was the Jelly test worth it? While were much happier now that Jelly has paijt fresh face, getting her there was a tough road.

We learned a lot along the way, and take pride knowing that her clean look is a result of our hard work, which afterall, is the DIYers mantra, is it not?

Stay tuned for more tales of topside fun, including our one-year update of the long-term panel test. My experience with using both brands was opposite to yours. The gloss achieved 2 part polyurethane paint for boats mini Epifanes was superior and weather did not affect the result.

Thanks Rob. The gloss was better with the Epiphane in our test. However, for someone who is more confident with their skills, or an amateur who is patient enough to do some mixing and applying trials, the Epiphane delivers outstanding gloss and a harder finish. So I think they are a better choice for top sides. Interlux is very sensitive to weather. The mono urethane will not gloss up in all but the perfect humidity and temperature conditions.

Epifanes is a totally different experience. They now recommend just rolling with a foam roller. I agree! The result is a spray like finish. Epifanes is very easy to patch repair. Your going to scratch your new paint work. This feature is very important. And probably not if you are inside. The stuff is very user friendly, much like poyurethane your house.

If you are spraying that is another story. If you can smell the solvents, you are breathing the solvents. Read the SDS and make 2 part polyurethane paint for boats mini own choice. The aggressive reducers and isocyanates in the converter are not something that I wish to have in my mino. In regards to spraying any 2-part paint, the isocyanates in the mist reach a hazardous level before you can smell any solvents. A simple elastomeric mask with an organic cartridge is not good enough � you need external air and a bunny suit.

Even then, you will feel like crap after with enough blowback from things like painting the inside of a transom corner. Regarding the last paragraph, has Toplac been discontinued? A tool to consider in my opinion the only one is a paint edger with thousands of short bristles woven in not glued to the pad.

This tool instantly gives you a perfect and even 2 part polyurethane paint for boats mini with vertical strokes as if you had brushed many times, without opening the paint so working time and ppaint edge are extended. It pulls the paint into an even layer that looks sprayed.

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