Thank you for the suggestions ! "With the hole in the cockpit... I have no other suggestions than to fiberglass it. If you wait a little while others might have more creative suggestions that suit your needs better. Concerning the hole in the hull, though... there wouldn't be any go-arounds to fiberglassing it over." Hole is on bottom of cockpit tub, which I understand is glued to the hull, so I think it would only be possible to treat as one would do one hole in one panel. "Are you planning to paint gelcoat or just sail this boat? If you are going to gelcoat the entire boat, I would just buy everything at once from US Composites." I am not planning to gelcoat the entire boat. However I would like it to look reasonably nice. I had in mind to fix dings/ cracks/ scratches in the hull using Marine Tex. I am not familiar with it or with any of the materials mentioned. I am inclined to go for epoxy/ fiberglass for fixing the hole.