Spray painting speakers?

Hey everyone,

Does anyone have experience with spray painting speakers? My parents have a set of old Bose speakers/receiver they'd be willing to give me, but the speakers are white while the rest of my home theater setup is black. I'd like to primer these and spray paint 'em black, but I'm not sure if it'll destroy the speakers themselves. Anyone have any tips on doing something like this?

Much appreciated,
Sheil