I've used Monokote for years, with good results. But last winter I covered a Venture 60 with it, and every time I fly it I have to re-shrink the covering on the wing and the turtledeck. It also developed a wrinkle under the canopy, where I can't get to it to fix it. I figure this must be due to the latest change in formula. Next time, something else, though I'm not sure what. I had problems with Ultracote many years ago.