I personally would do it, only because I did the same exact thing 3 times the past few weeks, 3 beaters for 10 bucks each, only because of the stems, RD and shifter levers they had.

You would be surprised how much rust comes off over the chrome with 0000 steel or brass wool. I know its putting lipstick on a pig in many cases on the beaters it can be fun if you have the space and time.