Okay, here's another tip, if your going the fiberglass the entire surface and paint routine. It may sound crazy, but believe me it works.

My friend was building a model of the "Quickee", a Bert Rutan design, that has no tail. It's a funky biplane design with a canard front elevator, and the flying wing behind the cockpit, and a rudder at the back. He got it built and I had more room so we glassed it at my shop. we used real light glas cloth and "Hobby-Poxy" fiberglass resin.( I don't think you can still buy Hobby Poxy) You paint the surface, then coat the cloth , lay it out on the plane, the take Toilet paper ant wick up all the excess resin from the surface, You'd think that the paper would stick to the surface but in fact the resin sticks to the TP instead.

If you decide to glass the plane and paint it, give it a try, it'll give you a beautiful smooth surface with just the right amount of cloth showing through.