Originally Posted by Ilia@IND
This is a route we've also considered, but unfortunately the problem lies in the chrome finish of the OEM pieces. The finish is quite tough, and does not prep well. Simply scuffing the finish leads to paint that will chip from the sidemarkers over time, but sanding all the way through the piece requires hours of labor and prep time, which increases the cost.
For this reason, we've found that the best possible route is to start with a plastic trim piece. The finished painted piece is more durable, and higher quality.
Totally agree with Ilia here. I had the stock ones painted gloss black and had the M3 badge filled and it was quite labor intensive.