I like Material Safety Data Sheets (MSDSs) not for the health and safety warnings but for what's in something. Cosmoline's ingredients are pretty unimpressive. Lime (calcium hydroxide), a cheap 6-carbon diol (double alcohol) and petroleum distillate.

There are the same corrosion concerns in another of my hobbies...a vintage Mercury outboard on a vintage boat. When old motors are used in salt water, people swear by Salt Away but it's just a detergent. For me, flushing and rinsing with fresh water can't be beat.

And I can't believe the price of these things.

1948 3/4-Ton 5-Window Flatbed Chevrolet

34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.