I'm not quite sure what material it is ... but the Mirrors on my new Kia Stinger and the front grilles have both some dark chrome surface. I had exeprimentally tried to just put CQuartz UK onto them as well ... with bad results ... its just smears, can't be properly buffed off and leaves horrible "coloring/Streaking" (a bit like oil on water surfaces). Took it off again with IPA/Koch Chemie Fleckenwasser easily. But now I wonder what to put on it?