The best way to learn about aircraft washing is to talk to someone who owns one. They can show you what to watch out for when spraying. They are things to be cautious and careful about, especially on helicopters (those propellers can not be touched the wrong way). Aircraft are usually easy to clean because airplane paint is a lot slicker than car paint and there is never road film to wash off. Usually just bugs on the front and exhaust from the engine. I charge more for doing aircraft versus doing a truck. Here is why:
1. There are a lot of places that you can take a truck to get it washed.(you can not exactly fly over to an airplane detail shop).
2. Aircraft can run in the $1,000,000.00 price range easily.(They are worth a lot of money, so the owners must be worth a lot too.)
3. You have to be careful on the delicate parts. (sensors,propellors, etc.)
Offer a free wash or discount to an owner if he shows you everything you need to know. Most I have dealt with love to share information and show you how much they know(show off). You may even score a free flight.