I have used KlassKote (and am currently finishing my latest design with same). It's very good material and I highly recommend it, even in cold climes (Our Canadian friend who wrote about it above).

I use the epoxy paint for bedding the glass (or in my case, carbon matting). I "glass" the whole model this way, wings and tail included. Lots of care used of course to avoid too much weight build up. For example, my stab/elevator in my new design is approx 240 sq in and weighs in at 4.5 ozs painted.

One wing panel of my new design is approx 540 square in and weighs in at 12 ozs fully balsa sheeted, glassed and painted and ready for the servo and linkage. Under 14 ozs rtf. It can be done, you just have to be careful. It will fly with a gas engine so it is strong enough. Carbon matting under the balsa sheeting next to the foam and oven the sheet as bedding for the paint.

BTW, carbon matting stiffens the structure nicely. No more flimsy ailerons elevators or rudder and very light too

MattK