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Most people here recommend Simple Green as an overall cleaner.I have used Gunk engine cleaner( I like the orange smell) on the stuff that had a lot of grease on them at the local wand wash and it works fine may need a couple of applications on the really heavy stuff.
i used simple green and a whole bunch of elbo grease - tooth brush - Q-tips -
then hit some area's with the rattle can - mine is no where near perfect
but i'm not ashamed to raise the hood at a show - t