VHT nightshades spray paint and prep work it's pretty easy just keep local laws in mind . In Utah lights have to be easily visible from 50' or something.
depends how dark you want to go.
if you do vht make sure to do lighter coats before the final wet coat if you want the glossy look, they can get dark fast pic of mine with vht
Just make sure you finish with a close up coat so they look shiny and wet. The first time i did mine I kept the can too far back and they looked grainy so I had to strip it off and do it again.
Do i separate the lens from the backing and paint the back of the lens?. And of course mask off the reverse light area. As for the local laws i don't know.