How to clean this.

[choijw2]

My last customer had these spots on driver window sill.

I tried APC, rubber cleaner, nothing worked.

I hoped gtechniq c4 would cover it but didn't work either

Any tricks?

[oboroballa03]

Maybe try some rubbing alcohol on it i am not sure never had a problem like that i am no professional either but good luck

[Hoytman]

How about a rotary, a wool pad at high speed, and some BC-2.

Try this... Mothers Back to Black Heavy Duty Trim Cleaner, best car wax remover plastic trim

[swanicyouth]

It's not dirty.

The UV protection coating is oxidizing. It analogous to clear coat failure on paint - except it's fake rubber.

Solution Finish should revive it.

[briarpatch]

Is that trim rubber or the hard plastic?

[precisionmobile85]

How about a rotary, a wool pad at high speed, and some BC-2.

Try this... http://www.autogeek.net/best-car-wax...stic-trim.html

Lol. I had to read that twice. I thought I misread the op. I have the same spots on trim as well. Tried everything I had to throw at it. Made it look better but didn't last long. I used the mothers back to black (non aresol). Worked the best surprisingly but spots reappeared after a week orbso

[Jay's 128i]

I second swanicyouth, Solution Finish is probably your best bet:
http://autogeek.commerce-search.net/...-trim-kit.html

[Hoytman]

I would still recommend cleaning the trim, rubber or plastic, with the Mothers HD Trim cleaner product I referenced, then proceed with Solution Finish...

...and then I'd top the Solution Finish with something like Wolfgang WETS, or Ultima Tire and Trim Guard...used as regular maintenance...even if bi-or-tri monthly. You'll be amazed at the results.

Coatings are another option if that's your fancy...still cleaning with Mothers HD Trim cleaner, Solution Finish, then something like a coating of Dlux.

Then again...lol...there's always the first option I mentioned...if you're brave. LOL!

[The Guz]

I would still recommend cleaning the trim, rubber or plastic, with the Mothers HD Trim cleaner product I referenced, then proceed with Solution Finish...

...and then I'd top the Solution Finish with something like Wolfgang WETS, or Ultima Tire and Trim Guard...used as regular maintenance...even if bi-or-tri monthly. You'll be amazed at the results.

Coatings are another option if that's your fancy...still cleaning with Mothers HD Trim cleaner, Solution Finish, then something like a coating of Dlux.

Then again...lol...there's always the first option I mentioned...if you're brave. LOL!

I would use APC before solution finish. In my opinion Mothers leaves a bit to much residue to clean up prior to using solution finish. IPA wipe prior to using solution finish for either cleaner used.

[Hoytman]

I've had APC leave residues on paint that had to be polished off per Mike Phillip's personal instruction...both Meguiars APC+ and OPC at 1:10 for both. So, if there's a concern about residue, then I'd be concerned with all3 products. However, residue from the Mothers product I mentioned hasn't been an issue for me (because I use wash afterwards with soap and water then rinse)...like many have not had issues with APC residue like I did. In either case for me, I don't let any of them dry on the surface and I rinse, and rinse, and rinse. There's always the option of using one after the other and IPA before using a restorer/protectant.