I used Spaz Stix Ultimate Mirror Chrome Spray can paint and it works beautifully, reference picture below. Just spray in light coats over a gloss black base, I used Rust-O-leum X2 cover Gloss Black for these rims.
Link to product
http://www.amazon.com/gp/product/B0015H1FGA/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1