That interior tho!
I don't think that trim is subject to corrosion - isn't it ABS? Maybe it's different for shadowline, but mine is definitely plastic.
If it were me, I would have the car checked thoroughly for rust. If no other rust exists, I wouldn't fret over the shadowline, or the deal. It's a fairly easy fix to sand it smooth and wrap it.
Got the kit to wrap mine today
*edit #1* - here is a screen grab from the online parts department at BMW of Silver Spring (getbmwparts). BMW categorizes the part number in question as "Body Hardware".
Buy the car and force BMW to fix it. That way you get your discount *and* get the problem fixed.
*edit #2* - got one side done this morning after originally posting this. Must say that it's a little more difficult than it appeared, but with patience you can get perfect results.
