I applied the Gorilla glue to the framing, and wet both sides of the sheeting, laid it in place and then wrapped it tightly with the stretch wrap. After sitting overnight, it is ready the strip and sand. The Gorilla glue sands like the balsa. For layering, I wet the base layer, applied an even coat of glue to the new piece and wet the back side, then wrapped the whole works. Because you stretch the plastic on, it stays tight till you cut it off. The first wrap takes both hands, but after that, and before you have it too tight, you can slide the sheet if it has moved, than continue around a few more times, and it isn't going anywhere.