Black Headlight Mod. Take the headlight apart by sticking it in the oven to soften up the adhesive. Spray all the chrome except the cones where the lights are. Most people do black but I've seen white, lime green, purple and silver. Let it dry and then to reattach you stick the lens back on the housing and stick back in oven for a little, pull out and push together for a firm seal. If needed you can add a little sealer for an added seal.What's BHLM?.