I'd leave the glassing for a larger bird, like the Top Flite Giant scales. I've read posts complaining of the flight characteristics on a .60 size Top Flite P-47, glassed, tipping the scales at 13+ pounds. The complaint was "I use the whole runway and it still won't take off", either that or they can't keep the nose out of the dirt. Which is a shame, because the Top Flite P-47 .60 is an excellent flier if you keep it within it's designed weight limits. I think the designed weight limits per the plans are 8 to 11 pounds, depending on how you build it (retracts, fixed gear, etc.) 2 extra pounds over the max is a lot of weight on a 63" wing. Which is why I've always said, I'd rather have a plane that looks great and flies great, as opposed to one thats over weight and looks pretty sitting on the ground. If you keep it within it's design limitations the Top Flite P-47 is arguably the best flier out of the Top Flite .60 birds. I'm currently building the P-47, have the Top Flite P40 kit, and will scratch build a Skyshark FW190A8. I think the Skyshark is probably going to leapfrog the P-40 and go on the board next tho.

If you insist on glassing and haven't done it before, search the boards here, there are lighter glassing methods than epoxy.