A mate of mine pointed this out today. Here is a Dutch website showing someones "home made" anti corrosion test. I'm not sure if you can buy these things in your neighbourhood. I think it is pretty straight forward and doesn't need translating. The guy totally coated the scrapers once with the anti corrosion substances and then sprayed the tools once a week with 1 litre of salty water, and recorded the results.
Zijn ACF-50 WD40 Tectyl Superwax S100 roomboter Vaseline werkelijk zo goed?
The funny thing is the butter worked pretty well until the temperature got up a bit.