I never have been able to get much visible effect of so called corrosion
removers. Oleic acid probably being best, but supposedly the Cramolin
chemist also had input on making deoxit. On a short term test I can
visibly
wipe off oxide with an alcohol swipe, being just as effective. Most of the
removing is mechanical in nature, and any liquid helps.

I'm inclined to disagree. Cramolin/DeOxit definitely work on tin- and
nickel-plated surfaces. They are not as effective on gold-plated surfaces;
ProGold does a better job. It isn't just a matter of mild abrasion; a
chemical reaction of some sort is needed.