I just sanded the bottom of my hull. Had some real bad gouges and scrapes. Most of the original finish was long gone. I sanded with an orbital sander and removed most of the small and med depth scratches. Want to fill the gouges. What's the best way to fill and smooth the bottom of the hull. I was planning on gel coating the bottom. I do beach the ski some, but never in real rough areas. Painting is the easiest fix, but I still want to smooth out the bottom of hull. Suggestions welcome.