Originally Posted by Dan12GT
Also there engine bay isn't exposed to UV like the exterior paint so I don't see any reason to apply actual wax to painted surfaces in the engine bay.
Also why are you mentioning exterior paint? We are talking about the engine bay...
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Seems obvious that Dawn in a spray bottle will end up on your fenders, but maybe it's only obvious to me. If you've got something working for ya and you're happy with it, more power to you. For me, Dawn is only used around a car to strip wax in preparation for paint or a full detail.