Depending on your access to material - you can etch the chrome off with a weak acid or sandblasting. It'd at least score the hell out of it and allow the paint to bond.
Stay clear of the hydrochloric or muriatic acids as they'll apparently heat the chrome and go after the base metal before the chrome is gone.
If you're looking for flatblack, are you opposed to Plastidip?
2012 Vulcan 900 Classic
:: You know you live in the future, when you require Tech Support to read your book. ::