From what I think I know - black chrome is/ can be a paint type application. You might want to check with a local paint shop or wheel shop as to whom they use to black chrome wheels........Hope that helps
If you can find a sample of black chrome that you like, I would suggest these guys. Paintscratch.com can match your color and put it in several forms......touch-up pen, spray cans, etc. I've used them before a long time ago and the paint was a perfect match!!
you can get it powder coated in black chrome... if you dont know what powdercoating its basically just a powder that is shot on instead of the conventional liquid paint its then cured in an oven, pretty much an over sized oven thats in your home. and it is possible to use your home oven. but its tougher than regular paint .. thats one way to get your color..
I went out and looked at my handles yesterday and they are just plastic aren't they? Coating plastic can be tricky to say the least! Usually the only plastic that holds up under cure temps would be like intake manifolds and some valve covers.