Like ralph said, I would be opting for powdercoating for a bit more durability. The powdercoater I use does carry a range of wrinkle finish powdercoats but I have never used that type on my machines so cannot comment on accuracy/quality.

This guy in the US seems to have had some success with paint though:

http://pinside.com/pinball/forum/topic/de-sega-stern-lockdown-bar-paint-ive-done-it-rattle-can-paint-match


http://www.autobarn.com.au/catalogsearch/result/?q=VHT+Black+WRINKLE+PLUS++Part%23VHT+SP201+Coating-+11+oz.+Aerosol