I had an E36 318 4 door in a couple weeks ago for some work.

The client put some sort of trim restore product(unspecified brand) on the door b-pillar panels. It didn't come out well, and looked like paint runs.

Compounding and polishing didn't touch it. My understanding is that the pillar trim is a satin black, in which case sanding them will destroy the finish. Client had two options - sand them and wrap, or replace.

My question involves the replacement parts - how is cost and availability? I'm not sure if an OEM part is called for here, or there's something in the aftermarket. Also, is removal and installation a fairly simple ordeal?

Client didn't take action but I'd like to have better answers if he does an about face or I run into this in the future.

TIA.