[Barnsnake]

At full output it will take 5-6 horsepower to turn that alternator. That will be tough with a narrow belt and a chromed pulley. A machine shop may be able to sandblast the pulley, or knurl it, or grind some texture into it without changing the groove dimensions too much.

It might be easier to get ahold of the alternator company and see if they can send you an un-plated one.