Pretty cool except for the bubbles haha. An easier way to smoke headlights and tail lights is to get a car clear coat, and drop several drops of black base coat in it and spray away. Make sure the lights are scuffed good with a gray scuff pad or 600-800 grit. That is if anyone has paint guns. I do this all the time for people on there cars and trucks, ive done it to my truck also.
Or on the cheap they actually make headlight and taillight clear coat in a spray can that has the tint already in it, not sure what its called but ive seen it before. Prep, prep, prep is what makes any paint job last and look good. Sorry for the rambling lol