Ken,
Have you tried to adhere a scrap piece of the covering to something smooth and clean like glass or something to see what the adhesive is doing? Then if it is still working, try the balsarite or I think Sig has something like Stix-it or something for their covering. Probably obvious, but I would wipe the wood down with a tack rag too to make sure the dust is clear.
Good Luck,
Curtis
P.S. Let us know what you find out.