I used a satin nickel color on mine. It's looks a lot like the factory brushed without looking fake and "ricer". Just pick a color that looks clean and simple. Nothing gaudy...
The trim pieces, wood or brushed or whatever, are all thin metal wrapped over a plastic frame. The plastic frame is used for the mounting tabs.
The driver side (small) piece just uses trim clips to hold it in. Gently pop it out with a nylon pry tool.
The passenger (large) piece uses nuts to hold it in place. You have to remove the whole IP top panel to properly take it off. Don't try and cheat by pulling the aitbag cover back to reach the nuts becasue you will bend the IP top panel and it will never sit right again.
Before you paint make sure you properly prep it. You won't need to do heavy sanding, but buy some 3M scratch pads and sand it down completely with those being sure to scuff every little part you can.
Shoot them with a can of primer, let it completely dry, then lightly scuff them again with the 3M scuff pad.
Wipe them down. If you don't have a tack cloth, you can use a clean rag with a tiny bit of thinner.
After the prepping, then paint. Do a few light coats at a time witing about 30 minutes between coats. This will keep it from running on you.
I don't have pictures of mine, but it turned out very nice. Take your time and good luck