Not airplanes but I did have a guy who worked for me for a short time who did.What I did paint before the economy went into the crapper was cement and refuse trucks, stood on the top of plenty of step ladders until the lifts were put in. All the paint was single stage and pumped about 200 ft to the booth where there it was mixed with the hardner through a computer setup.Such as these:
http://public.graco.be/0/images/plur..._finishing.jpg
everything painted was using Akzo Nobel paint(Sikkens)