I am putting toghether a glider that has foam,wood and plastic pieces. What is a real good epoxy to use on this. I am needing to mate the wings together which are made of styrofoam wrapped with plastic, and also at the joint there is a 3 piece plywood spar that slides into the foam. I have some epoxy that I used on a balsa wood kit and it doesn't want to stick that well. Do any of you guys have any ideas? Thanks much.