I'm restoring a 1970 something sunfish and I have screw holes in my boat that are shot all the way through. I have filled all of the other holes with epoxy and I'm not sure what to do with these. I think that putting a sheet of fiberglass over the top is a bit excessive but im not sure what my other options are. Theres no wood backing and I can access both sides with a view port. Any ideas of ways to fill them without having resin run through?