honestly bro, although this most likely isnt what you want to hear, leave them alone. i wouldnt do it if i were you. a friend of mine did them on his JDM headlights, and did it right might i add, and it looked like crap after a few months. i also did mine on my civic and ended up just buying another set of stocks. if you really want the black housing look, just buy another set that has been sealed properly. this way, you can still have your stocks. just my opinion. do what you want.