Years ago I had an assload of take-off E30 fasteners from cars I’d dismantled for parts. I sent them out to be electroplated so they’d look shiny and new. Really turned out great. I’ve been using them ever since.
http://www.camyerelectroplating.com/
Background and instructions.
http://forums.bimmerforums.com/forum/showthread.php?1895379-Refreshing-old-fasteners&highlight=plating