If you're going for the OEM look, they shouldn't be glossy. THe paint to use is a satin black to have a slight sheen on them, and nothing more. Otherwise, what XwP1ayawX said is the best alternate and pretty much the only other thing you can do with them.I tried spray painting my front vents black with spray paint but they look dull. I also tried a spray paint and the bottle said "with gloss finish" and it still looks dull. Any suggestions?