I bought a 30 foot fiberglass boat that needs major repairs. They were thinking of selling the hull as scrap fiberglass so there are multiple cuts at least a half inch thick from the top to the bottom of the hull and also horizontal cuts to match, from an electric saw i geuss. There are also 2 or 3 holes about 3 to 5 inches in diameter near the bottom. My question is if it will be possible for me to cut plywood to fit the size of each cut and hole then coat the edges with epoxy and hardener, have it cure in place and then cover it with fiberglass and apoxy resin. If it is possible (which I hope it is) What is the difference between regular and marine grade plywood? Is there a specific cheaper type of marine grade epoxy, hardener and/or fiberglass I should use? If it is not possible how else might I go about it? This boat will stay in the water and will also be carrying heavy weight so the hull needs to be in top shape and able to last a long time even in rough seas. I was made in 1987. Here are the pictures and supplies i'm looking at using as well as additional questions. Also I was looking for vinylester gelcoating because I thought it would be cheaper, but couldn't locate any brand. Home