Remove grille insert....about 6 or 8 8mm screws. Takes less than 1 minute. Mask outside edge. Sand all horizontal grids and center vertical grid. Spray 2 coats of primer. Steel wool. Spray 3 coats of flat black. Steel wool. Final coat of satin black.
<img src="http://img2.uploadimages.net/612979e320_grille3.jpg"/>
<img src="http://img2.uploadimages.net/612979e320_grille3.jpg"/>