for the housing to come apart some people use the oven (on a soft setting) to heat it up, had a hot day a couple of weeks ago (around 26/28) and i was able to pull the glass off the headlight just with some pry bars, just make sure you only spray the chrome bits on the inside, then if you want to tint the glass, just use some vht niteshade, but please, only a small, light coat