Hmmm....as I recall, Southern RC's "Gatorhide" was 1/16" balsa with a resin-impregnated cloth on one side. That allowed it to go around curves very smoothly...like the leading edge of a foam wing (resin side out). I remember the original Southern RC Tiger Tail and Sweetater both having kits with the wing pre-covered in Gatorhide. It was very tough stuff, and made for a very strong wing.