Dave,
The "new" NASS .21 Proto Speed Class has only 3 guys that have built models. Glen Van Sant, Henry Nelson, and Myself. Mine, is built much like many of my other models. Balsa framed in Bass for the wing and stab.
I cover the model parts including the Fuselage with .6 0z Glass Cloth. I also use Z-Poxy. I have also used Bob Smith epoxy, both with good results.
Bill Hughes