Follow on the epoxy though, the great enemy of any gluing process is grease as you don't get a good bond to the surface. While I've never applied it to a boat, I'd be fairly certain that glass fibre release agent would also greatly impede the bond as well as any anti-fouling treatment applied. Bet the instructions with the glue say to both clean and abrade the surface.
Certainly in my world, I can do a lot with glue, but my mantra is thoroughly degrease, and then, do it again.