Information on Foam Wing Sheeting
You have to use the shucks to make the wings.
I make a "sandwich" of the bottom shuck, thin plastic (to protect shuck in case any poly glue escapes), balsa sheeting, foam core, balsa sheeting, thin plastic, and the top shuck. On top of this I put a 3/4" plywood board and clamp it to my flat building surface with a little pressure to compress the whole thing. Keep looking at the core until the balsa is in contact with the foam and you'll know how much to compress the whole thing.
I then go around the board and measure from the table to the plywood board to ensure that there is an equal distance all around, thus giving me consistent pressure to the whole wing core.
I let the whole thing cure overnight, but the instructions with the glue says it cures in less time. Some of the glue may foam out the root or tip of the core you you can test it to see if the core is ready.
Keith