BLACK! I painted mine a few months ago...here is my thread on it: Busy Weekend! 56K sorry
Clemsonranger03 tried painting his with "chrome" paint, but he said it was just silver.
Silver might not look too bad, but black looks SICK
See my thread for some pics of how Krylon Fusion Gloss Black turned out. As for prep work, I just took my grill out, washed it with soap and water, let it dry, then shot it with the Fusion paint. I put about 2-3 coats. I was gonna do clear on top, but I got the wrong kind of clear coat (o'reilly's didn't have fusion clear coat when i went), so it's just the paint.