I use Simple green and Denatured alcohol to. a 2 part green and 5 part water mixture is good for an overl spray down (minus the electronics ofcourse) and when my motor has some baked on crust i shoot it with some denatured alcohol.
I've found that the denatured alcohol discolors my plastics. It dulls them a bit. I don't have an air compressor so maybe it's because it sits on there too long. This happen to anyone else?