[Sheepy]

Hi guys, just wondering if anybody has any tips for cleaning up the black gloss window trim on the e92 M sport models? Mine has discoloured a little near where the trim meets the wing mirror, I've tried polishing it by hand but it's made little if any difference. I'm hoping there is a product out there that will do the job as I don't really fancy having to replace the trim. Over to you guys,
Thanks.