Aerowoof is right, Use titebond or good old Elmer's. I have used fiberglass resin on my firewall as fuel proofer & also, on my wing joints I always use it with the fiberglass cloth. You're right, it's easier to work with than epoxy. I've done a lot of "glass work" Vettes , boats etc.& by it's self it wouldn't be strong enough for stress areas. It actually gets it's strength when you use it with the fiberglass cloth .