Re: Black Chrome???
typically chrome is plating, needs to be applied to metal.
door moldings are chrome plated plastic so traditional chrome NG. so there are specialty plastic chromers. BUT I have never seen a plastic chromer that does BLACK CHROME.
there also is black chrome powdercoating but again, this will not work on plastic.
so really, you need a painter. and if he can MIMIC black chrome, then that might be best way to go. then ask him to use a 'Ceramic Clear' to protect that paint.