I went out to take some pictures but couldn't find the piece that I pulled off, but I did attach some pictures of the LR Wheel trim. On the RR side you can see there is some leftover adhesive tape I still need to remove.
Looking at it it closely it reminds me of that cheap chrome door edge trim they sell at auto parts stores.
My car has the M21 option but not M26 so I compared the roof drip molding to whats on the wheel well, its a night and day difference. Guess I've never bothered to pay much attention to my trim!