Chrome grille surrounds are pretty easy to paint, but you need to be precise in your technique.

First, you'll have to remove the surround from the center--if memory serves me correctly, you do this by punching the centers out of the plastic connectors. I can't remember if the fasteners are reusable after that--may have to replace with small bolts.

The chrome is actually covered by some kind of clear acrylic coating for durability, so you'll actually be painting that.

You'll need to rough up the acrylic with sandpaper first. I think I used 400 grit. Don't get too aggressive, you don't have to remove the acrylic, just
take the gloss off. The surface should still feel smooth to the finger when you are done.

Then just apply spray paint, airbrush etc. I did mine about four years and 30,000 miles ago, and it still looks good. The paint has flaked in a very minor way in a few spots, but overall it's holding up well.

HTH,

DS