Having reviewed previous similar topics I think this problem is similar but unique. My entire deck area except for the nonskid is crazed into a mosaic of gelcoat chips about 1/8" in diameter. It is very difficult to keep clean. My current approach is to wet sand these areas with 100 grit to clean it a few times per year. This strategy is part of my plan to thin the gelcoat down to a thickness that can be more easily filled with a few coats of barrier coat. I'd appreciate any advice or other strategies or products. The boat is well worht the effort. thanks Nick