This boat will be used for duck hunting with a long tail muc motor that i built. Previous owner had leaks and rivets that were bad instead of redoing them he applied fiberglass and poly resin. Well I would like to apply steel flex to it but the steel flex is epoxy and epoxy doesn't stick to poly resin very good. I have tried a a wire stripper no luck, tried random orbital sander with 40 grit sand paper well it kinda works but very slow. Tried grinder with 36 grit sand paper now we are cooking just worried should i remove paint also or just fiberglass and resin then use sander to remove paint. would hate to creat another hole or grind the aluminium to thin. any ideas or suggestions.