>>>Beyond the cosmetics, I'm worried about the parts that are now
>>>unwittingly in the white rusting. It's beyond me why they haven't
>>>already, really.
>>
>>Most grades of non-"stainless" steel don't rust at any appreciable
>>rate in dry air.
>
>It does get pretty humid here in the summertime, but I've got air
>conditioning for the worst days. I should probably get some Zerust
>tabs or silica gel packets for my storage setup, though, just to be
>that much safer.
>

If you're particularly worried, a light oil coating will keep the oxygen away from the steel and prevent further corrosion - so long as there's no mechanical friction on the piece to wear away the coating, it'll last indefinitely.

Whatever gun oil you have on hand should do just fine until you can talk to your re-blueing person :-)