TCMan, we used to use polyseter resin to glass our sheeted foam wings long before the thin finishing and laminating epoxies became readily available. I have used polyester to do probably 100+ wing panels over the years. You just need to make sure there are no voids in your sheeting seams, pinholes, etc. where the resin can leak through. Also need to be extra-careful around tips and the root (consider adding a 1/16" balsa root rib as protection). Don't pour the resin on, just lightly brush it and sqeegee the excess around, being particularly careful around the edges and openings.

Having said that, epoxy is far better (stronger) and easier to work with. Why not just spend $10 or so and get some Z-Poxy epoxy laminating resin? One kit will easily do a decent sized wing and tail. West Systems is even better but more costly and not as user-friendly (i.e. 5-1 mixing ratio).

Sound like you have not glassed wings before? If not, you may want to do a search on RCU, I am sure there are some good tips here.

Barry