Wax
When I used to work at a car detailing company, we used to use soapy water and a tooth brush to remove residue wax on plastic parts. (flares, bumpers etc..) the toothbrush works great on textured plastics. good luck
I use turtle wax ice. they claim you can wax plastic trim and it won't turn white. I did not wax My fenders but I'm sure I got some on them and no white. I thought about waxing them to see if it sheds mud better but I wonder how long it would stay on the plastic.
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I have had good luck with Turtle Wax ICE as well. It is not as fancy as Zaino or any of the other designer waxes but I have been using it on my cars since it came out and it goes on so easy and lasts long enough for me.


