>>10942735The process is drastically slowed. This is a BMP wreck from the Chad-Libya war of 1986 photographed decades later. There is rust present near the less-damaged rear, but very little. If this wreck were in a more moist environment it would be heavily rusted. So if we were to work this out into a rule of thumb for modeling, it would be reasonable to think of it as 10 years in the desert = 1 year of exposure elsewhere. As an additional caveat, the metal treads would rust up much faster on account of having the opportunity to dig in to more moist soil or transit through moist areas (not all of Libya/Egypt is desert, after all).
