One solution is to clean the up real good, buff them out so no rust is left
and then take them to a plater and have them re-plated. Look in the yellow
pages under metal finishers or plater's. Should run around 50 bucks to
have done, if you clean the up real good. Another solution is to buy a
product called tool dip. It comes in various colors and is used to
insulate tool handles. Again, clean the rack real good. Start by thinning
the tool dip a little. If you can find a disposable pan large enough to
hold the racks, you could pour the dip into the an and then dip the racks
and remove. Allow to drip and the hang to dry. It might take several
coats to cover all the way and get smooth but it will be durable and won't
rust unless the coating is cut. Tool dip cost around 10 bucks a can and I'd
get two or three cans. Tool dip also works great for sealing battery
terminals when they are new, sealing wire connections and loads of other
uses fro insulating or proving a cushion for noise reduction. JC Whiteny,
McMaster-Carr and a lot of auto parts houses sell it.
HTH
Mike