I have found that treating the airframe with hair spray makes the covering stick better and in Monokote's case shrink better. I can re-heat wrinkes at 350F and it will stick back down. I read about this tip at another site and decided to try it, it works. Spray the airframe with hair spray between the 220 grit and 320 grit sanding, clean and cover. Don't knock it until you try it.