The original Cosmoline was an ointment and was used for many different cosmetic and medical purposes, it was even advocated to promote hair growth. It was kept in homes to disinfect wounds and was used by veterinarians to treat cuts, abrasions, bruises and sprains.

Why do they put cosmoline on guns?

Cosmoline is used to protect the gun against rusting; however, many military surplus rifles were previously submerged in the greasy substance, making its eventual removal seemingly problematic. ... Over time, Cosmoline may have seeped into nooks, crevices, and gaps in the metal but it is actually fairly simple to remove.

Is cosmoline a good lubricant?

If you need to lubricate, prevent rust, or preserve anything from firearms to tools and machinery, Cosmoline is the absolute best product on the market.