Not wanting to buy the shadowline trim from BMW due to the outrageous price, I considered painting it black.
I asked a local shop about painting my trim black, but was recommended that a vinyl overlay would be much cheaper.
If you're looking for a vinyl overlay, I was quoted $100 at X-Treme Graphics in Villa Park. I believe it comes with a year warantee.
Make sure to say you were referred
Oh, this is assuming you live in the Chicago area