I only tried to paint over momo on an open bay wing once. Even with scuffing the covering it looked pretty good but when the covering sagged some of the paint came off, when I tried to tighten up the covering with an iron the paint flaked off. If I'm going to paint a plane I either glass or use Tex covering. If it's a sheeted plane then I glass, if open bay I use the Tex. It's also very easy to just use colored Tex covering and pin stripe but I do that because my painting skills are lacking and I take the easy sure way out. Some would say the chickens way but I'm good with that too.