Re: Powder coat insde rim.
I had my OE rims (originally polished aluminum) powder coated black about 6 months ago. The brake dust basically turns the gloss black to matte black, which still looks pretty good. I am also running hawk HPS pads, which reduced brake dust considerably. As a bonus, the black also makes the red calipers stand out better.
I'm not sure if the baking process would mess up the chrome or not, but you should make sure you find a reputable coater to discuss your plan.
2007 AO/BLK | K&N | Strano Sway Bar | Koni Yellows
Atlanta Region SCCA #26ss