Call me crazy, but I'll show you myself if you're in LA. I decided to take the chance-had nothing to lose- I used 8 squares of 220 sandpaper on my little sander- I sanded it to the black. I started to realize that this damn material(skin) is very strong-it's like sanding a tire(not that I have), but my guess is it wouldn't do much had there been paint on it. The wing is much more durable anyway-I sanded every ounce of paint off-there were tiny lines on the rubber wing still. I guess those ugly cracks leave a scar all the way to hell)-I tried to sand that off-that material is damn durable- so sand away-USe 220, and start soft for your satifaction-then you'll get to know what you're doing, and you'll see the light. This is after hearing that YOU CAN NOT do this. Not true- the wing is now primed, and looking sweet...