I've got the eBay "urethane" lip on its way to replace my OEM that has suffered through 11 years of scrapes and at least 1 repair.
I'd prefer to paint the replacement (gloss black - to match the car) but I'm not sure of the process and products. What would be the recommended primer and paint?

Edit: Replacement spoiler lip just got delivered. There is a page of information included in the box with painting and prep instructions.
Basically - clean lip with Simple Green or 3M prep solvent, scuff up lip with 320-440 grit paper, apply Dupont plastic prep or similar, primer, sand with 4-500 grit, clean, then use urethane based paint such as Dupont Chromasystem.

 

Does it look fine if just left black (the cheapie lip)?

 

I think so