I was having a problem with the clear on the outboard flap. I cratered every time I painted it. So yesterday I sanded it all off. Down to the CF and brought it back up. Well feeling gun shy about trying it again I decided to try the Krylon Crystal clear I had bought for decals. The is a electric model so it doesn't have to b fuel proof and its only on the flap. I painted the first 2 coats and it looks the same as my catalyzed urethane. So the the fix is complete.