I am ready to paint my brand new flaperons. I already have the wings painted so I am focused soley on the flaperons. I am thinking about using single stage urethane (car paint) so I can match the color of the wings and also use it on the fiberglass with a flex additive. I am wondering what kind of prep is necessary on the aluminum flaperons to get the paint to stick? I don't have much experience with painting aluminum and neither does the paint store since there are not alot of aluminum cars on the road. I goggle this and as you can imagine, I get everything from etching to alodining, to scuff and paint. Just wondering what worked for other people. Not going for a showroom finish... just want to make sure the paint doesn't blow off during flight.