Joe,

You may try to iron it, it may still have moisture in it. Use a REGULAR clothing iron, and lay the iron on the stab for a few minutes on a flat surface. If this doesn't work, taking off the offending sheeting with a belt sander (carefully ) should be quick, and painless.
White glue and water mix-60% glue 40% water max.
You didn't say what you used to glue the sheeting down with, but if you used yellow, or white glue, the heat will "loosen" the glue and it should lay down.
You can use yellow glue for sheeting wings ect. by applying the glue, let it dry, and then iron the part on. The glue will grab, and after it cools, it will be just as if you glued it down regularly, but without all the pin holes or clamping usually associated with holding parts while it dries.

Jetts