Made my first fiberglass canopy 'shell' and need some guidance. The canopy will form the superstructure with windows cut out and sectioned for opening and closing. I used 2 layers of a medium weave glass-don't know what weight. Before I take it off the plug and cut-how do I get a good smooth surface? A bunch of dimples where the resin 'ran'. It will need reinforcing in places, like joints. Add more resin on top and sand, reeinforce inside? How many layers of glass for strength? It's about 11" long, 4" high, 3 1/2 wide-if that helps.