System three clear coat works well, it thins nicely with denatured alcohol and sands well. Cure time is about 3-4 hours. Perfect for fiberglassing. I have used it with success on a couple different projects.
See:
http://www.nelsonhobby.com/epoxies.html
If strength in a wood epoxy is needed, there is nothing better than T88. Full scale kit builders swear by it. It sands good too.
Some online wood working stores carry these glues.
-Ron