Over the last 9 months I had tried DG #481, IPA, clay, vinyl erasers, etc. all recommended on these forums on my GF's gray textured hard plastic on her 2010 mustang. It had been stained by WGDGPS 3.0 since the first week of owning it where I got a little careless in the summer hear with my PC and a large 6" pad. Just this last Friday I tried some Optimum Power Clean at 3:1 as recommended by others applied by sprayer and scrubbed with a short nap MF towel. It came right out with little to no effort and looked fabulous. I dressed the trim with UTTGP after that and it looks amazing!