Marine High Gloss Gelcoat Compound quickly removes P600 dual action or P1000 wet sanding scratches from production gelcoat. Our compound produces a high gloss finish. This gelcoat compound restores boats to a shiny, glistening appearance that sparkles in the sunlight. 3M ™ Marine High Gloss Gelcoat Compound revives the sparkle and shine that makes a boat glisten out on the water on a sunny day. Compounding removes the scratch pattern left by abrasives in previous sanding applications. You can expect it to effectively remove P600 and P1000 sanding scratches in the gelcoat.