Remember Vapor pressure from high school chemistry? College chemistry?
Anyway, oil has a vapor pressure, and so it evaporates in our atmosphere.
After it has evaporated, it is no longer protecting the steel.
So if I rub oil on something, in 6 months, that oil may be gone.
Cosmoline has some wax in it, that does not evaporate
The word 'forum" does not mean "not criticizing books."
"Ad hominem fallacy" is not the same as point by point criticism of books. If you bought the book, and believe it all, it may FEEL like an ad hominem attack, but you might strive to accept other points of view may exist.
Are we a nation of competing ideas, or a nation of forced conformity of thought?