i was contemplating on skinning the fus and wings with thinner balsa as i possibly could and then glassing the fuselage with a good grade. bassicaly cutting corners to try keep the weigth down on the fus.
I would stick with with the thickness that the designer incorporated. The thinner the sheeting is, the more it will sag in between ribs, stingers and formers. If weight is the primary concern, I would glass it with 1/2 Oz. cloth and MinWax polyurethane. Use the lightweight Spackle (similar to Goldberg Model Magic) to fill the weave. Then one coat of Plastikote "High Build" sandable primer. Sand that until smooth with 400, one more LIGHT coat of primer sanded with 600. Finally, finish it off with your choice of paint scheme.
Doug