I had some mixed results polishing up the dark chrome trim this weekend, but I learned a lot.
Even though my car spends 95% of its life indoors, the trim already looked like spotty crap. The pieces outlining the hatch were the worst, so I started there.
I first tried a claybar + detailing spray. Perhaps I didn't rub hard enough (and you're not supposed to use a lot of pressure anyway) but it didn't affect the spots at all.
So out came the
Turtle Wax Polishing Compound (light/medium). I used medium pressure, then wiped, and could see a cleared up area:
It took multiple cycles, but I finally got it cleaned up.
The only problem is that I removed the topmost, darker layer of the chrome. But they looked nice:
At this point I had to decide what to do about the rear door trim. I tried using a little less pressure, but to no avail:
So I ended up hard-cleaning the rear door trim as well. By the time I got to the front doors, I learned how to use *just* the right amount of pressure to clean the trim without taking off the top layer. Unfortunately there is now a not-so-subtle difference between the trim pieces, which I didn't really see until I approached my car in the parking lot later in the day. The front door trim weren't nearly as spotty, which might have helped. If they're too marred, there's likely no other way than to strip the top layer.
I plan on checking with the dealer on warranty coverage, or at least get a quote on replacing them altogether, or just brighten the front door pieces to match.
Pro-tip I realized halfway through... use this opportunity to apply 303 Protectant (or whatever your rubber/trim preserver of choice is) to the weatherstripping around the doors. It keeps the polish from sticking as much.