Pacer's Finishing Epoxy Resin system is specifically formulated to bond fiberglass to wood and foam. This is the best finishing method for foam or balsa/ply sheeted surfaces.
If you are after the "perfect" finish, fiber-glassing is the best method to seal the surface for painting.
The Finishing Epoxy is shock and solvents resistant, non-brittle, easy to sand, and has flow characteristics. The total working time of the resin is 60 minutes, fully cures in 3 hours.