^ What Bo said..
Remove all wiring,bulbs, screws and rubber grommets. Bake em for 12 min at 200*. Gently pry the lenses off and allow everything to cool. (make sure you dont get that sealing goop on the reflectors.. it
DOES NOT like to come back off). The chrome bezel that surrounds the projector is actually screwed to the backside of the clear lens. Remove the bezel from the lens, scuff lightly with a green or red scotch pad and paint with your choice of black paint. I used rustoleum stuff designed for plastics. Let them sit for a full day if you can to allow them to fully off gas and not cloud the lenses after re-assembly. Once they're nice and cured, screw the bezel to the back of the lens. You wont be able to fully seat the lens into the housing with the sealer cold.. but get it all snugged in best you can (leave out the screws for now). Bake again at same temp for same time then push the lenses all the way into the headlight housing until they seat fully. Screw all the outer screws back in.. add wiring/bulbs/grommets back and you're done.
pics of mine
You can do it..