Layer it up with light weight fleece and staple down at the sides. Use the resin (alot) to soak the fleece so that the whole things gets full of resin. Then start your fiberglass layers on top of that. I used about 4 layers on top of my fleece. I figured if I soaked my fleece up pretty good it would act like a 1/4" thick piece of fiberglass with the resin it it so I shouldn't need as many top layers fo fiberglass.