I went with epoxy to attach the glass only because I was worried about the water based material warping/swelling the balsa. I did not glass the control surface leading edges or aileron bays. Rather I used MinWax sanding sealer followed by a couple coats of the Polycrylic (water-based) and it came out fine.

The Polycrylic seems to work very well as a second coat to fill the cloth. 1st coat of cloth/epoxy added 101 grams. 2 coats of brushed Poly only added 27 grams before sanding, so the stuff is light.