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4. Apply a third coat while the second coat is still slightly tacky. You can add any number of coats to build up the desired coating thickness while the previous coat is still slightly tacky. Be sure to level out each fresh coating with the foam brush. 5. Allow these coats to cure fully. The cure can be accelerated with moderate heat, but too much heat may cause bubbling. 6. Wet sand the cured 105/207 epoxy surface to a 220-grit or finer finish (Figure 7-5). Rinse the surface with clean water. Rinse water should sheet evenly, without beading or fish-eyeing. If rinse water beads up (a sign of contamination), wipe the area with solvent and dry with paper towels, then wet sand again until beading is eliminated. Proceed with the finish coating after the surface has dried thoroughly. discount composite wood prices in hong kongSee Section 8.4.1, Surface preparation, Special preparation for various materials, Cured epoxy. 7.3 Clear finish coatings Even though a properly applied 105/207 coating may have a high gloss finish equal to that of a good varnish, we recommend that this surface be coated with a top quality spar varnish for UV protection and maximum performance.
Two-part polyurethanes bond well to cured WEST SYSTEM epoxy surfaces and provide great hardness and Protecting and Maintaining Wooden Boats 51 Figure 7-3 Roll lightly and randomly over a small area. Spread the epoxy into a thin even film. Figure 7-4 Tip off the coating by dragging a foam roller brush lightly over the fresh epoxy. Figure 7-5 Wet sand to a smooth finish. Figure 7-6 Rinse water should sheet without beading, indicating an uncontaminated surface. 7 durability while retaining a high-gloss, UV-resistant surface. Be sure the surface is properly prepared, see Section 8.4.1. 1. Thoroughly mix the two-part polyurethane varnish in the proper ratio. 2. For major applications over large surface areas, always use the 800 Foam Roller which will give a more uniform application in less time.flame retardant deck furniture ideasThis means runs are less likely during application and you will have more time to do touch up. 3. Use a high quality brush with a tapered tip, 2" to 3" wide, depending on the intricacies of the surface to be coated. 4. During application, the roller will leave a slightly stippled surface with some air entrapped in the coating.
In most instances this stipple will flow out and the bubbles will pop on their own to leave a smooth, high-gloss surface upon cure. In some conditions, you will need to brush out the rolled-on coating to assist the leveling process. Do this by lightly brushing the surface with smooth, even strokes as soon as possible after you have applied the varnish. Be aware that the time available to perform this "tipping off" will vary by climate. Cooler temperatures should allow 5 to 10 minutes to tip off a newly applied coating with no difficulty; hot, dry conditions will allow you less time. For health reasons, best decking scheduling approachwe do not recommend spraying two-part polyurethane. Inhalation of fumes, dust, vapors and droplets must be avoided. Spraying marine paints in general is not recommended except if done by a trained professional with industrial grade equipment and only in properly ventilated areas.
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