I ordered 3 ea. of red ultracote covering and all three have a different backing (not the protective paper). One has a silver backing, the other 2 do not. One of those 2 has a tacky feel to it while the other did not. Do I have 3 different products for different applications or what? I didn't realize they were different until I opened the the 2nd roll. The first had the silver backing and I used it to cover the fuselage which went fine. The 2nd roll had the tacky backing and it seems to not stick all that well on the wing. Before I finish the wink with the 3rd roll I want to make sure I'm using the correct version of ULTRACOTE. Any thoughts on what I have for coverings?