nothing to do with nitrous, but in an effort to help clean up the engine bay a bit i got a fancy stainless overflow tank to replace the plastic one which just looked weird now since there is no battery there.
and immediately decided this is way to shiny and hit it with some VHT wrinkle black.
and then i thought it would be odd to have a wrinkle black coolant puke tank next to a shiny black oil catch can, so that got the same treatment.
side note, there was literally no oil in the catch can. some residue.