Pop off the bezels. Sand them down until they look like brushed aluminum (spellinglol).
Wash them. Dry them. Lay on 3 coats of adhesion promoter, 10 min between coats. Lay down 3-4 coats of your choice paint 10-15min between coats making the last coat a little thicker (without runs). Let dry for about 1/2 hour, examine for flaws. Sand out flaws with a lighter paper. Wipe clean with a damp rag. Lay on a final medium coat. Clear it if you wish. Basically what I did for mine and I love em.
