Gelcoat crazing repair6/11/2023 ![]() Make sure no air bubbles or gaps are left in the cracks, and use a plastic resin spreader, putty knife, tongue depressor, or similar object to smooth out the surface. When you're satisfied with the color match, mix a final batch and use it to fill the cracks and cover all sanded areas. Also remember that the new gelcoat will fade at a different rate than the rest of the boat, and a few years down the line, the difference may become visible. Remember, gelcoat can change color slightly as it hardens, so to match it exactly you'll need to mix a test batch or two, allow it to harden on a piece of cardboard, and then compare the final color against your existing gelcoat. Most gelcoat pastes are available in white or neutral colors, but straight out of the can they rarely match aged gelcoat. Using gelcoat paste, add a coloring agent to match the color of your gelcoat, if necessary.
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