I can't remember which thread I read it in but somebody wanted to adhere fiberglass to metal and somebody in here suggested sekiflex ? I just got back from an automotive paint store and they recommend a product called Plio Grip made by Valvoline . It's a two part epoxy . I'm going to try it on my fiberglass rear bumper filler panel . They said it's the best you can buy , we'll see . 
