Originally Posted by vtec_

@Capt. Obvious what do you use to shine up those fender liners?

Originally Posted by Capt. Obvious

There were a few steps. This is the before pic:

I should have used the driver front for the before example because it was worse, but the lighting was too harsh to get a good pic. The whiteness of the fender liners in the pic is not dirt, it was UV fading and the plastic had turned gray/white, like you often see on unpainted plastic trim and bumpers on cars. I first cleaned the fender wells with foaming engine cleaner and a pressure washer with a 25* tip. After that, I used my heat gun to bring the color back out of the plastics (this is something you should only do once or twice as it is hard on the plastic since it works by melting the top surface and drawing oils out from deeper in the plastic). After that I gave them a couple coats of plastic trim restorer. Since this car lives in the garage now and will only see a couple thousand miles of use per year they will probably stay looking nice for quite awhile. I will probably need to reapply the trim restorer whenever I have the wheels off though.