I have no experience when using glue, I do use ( thousands) of paper pieces from PaperPieces. Com, but I use starch, not glue ( Missie Carpenter's technique from Traditional Primitives) my papers do get bent a bit at times. I am very careful to flatten/smooth them out when I remove them, then I keep them in a flat tin * like decks of cards would come in*
They have been reusable many, many times even with some slight ( wrinkles)