ORIGINAL: impactiq
If you are going to go the sheeting route.... here is something to think about. Dynamic Balsa offers foam wing cores along with the cores for the stab.
http://dbalsa.com/
Click on "foam wings". In the right hand colum, click on "replacement wings". Click on the letter "U" and the wing/stab cores are the first ones on the list.
I just bought a set of these cores from Dynamic Balsa last month to go along with a glass UFO fuselage I stumbled into. The cores seem to be top quality. I should probably do a build thread on a foam and glass UFO when I get started.