Currently I am servicing 3 planes right now. Cessena 182, A36 Bonanza and Turbo Bonanaza. There is no clear coat on most planes there for it is almost im possible to remove scratches because you are removing the paint too. For airplanes the hardest part are the bellies of them because the exhaust let out is down there and there is so much grease it takes for ever. A nice citrus cleaner works incredible on this. High wing air planes are hard to get all the spot, bring ladders!! For the windows most are not glass, most a plexiglass so poslishing these can get scratches out. Normally I wash them with Meg Gold Class and follow up with a nice cleaner wax. Depending on the age and condition of the plane you can either follow up with a pure wax and or something along the lines of NXT(works great on planes too) Be prepared for scrubbing bugs. Think hitting a bug at 60 mph on the highway is hard to get off? Try 180. Constatnt care of the spinner with with muliple coats of polish on it keeps it looking nice if it is a chrome one. Remember planes are flown in the worst condition then store outside for long periods times or a dust filled hanger.