Iron + oxygen = rust Chromed Plated steel can be substituted for Stainless If you ride in the wet and are really Anal
dry the water off after every Ride
But if the component companies s make their proprietary parts in CP steel all you can do is like Paint over
with paint , or clear lacquer , nail polish etc.
I like Black Anodized over Polished aluminum too for the anodizing is an anti corrosion treatment.