Hello, doing a patch repair on my fiberglass boat and am wondering.. Is there a good, better, best with this? I have already purchased Marine grade plywood (3/4) but do not have epoxy or fiberglass mat purchased yet.. Would it be best to treat the plywood with epoxy or some waterproofing before I lay fiberglass on it? If I would epoxy/waterproof then lay fiberglass should I worry about the floor being uneven as a result? Thanks in advance for any help!