Quote:
Originally Posted by jimmycrackcorn
x2 on the purple power. I use it through a foam cannon, let it soak, then pressure wash it off. Only variation I have in the process is I hose the entire engine compartment down with tire foam, then start the engine and let it dry like that. Haven't had a problem, and I've noticed that by doing it that way it really cuts down on the dirt collection.
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spraying any kind of tire foam or dressing on the engine is a dirt magnet