That's true as well! Although when I played with mine outside, they did develop some rust.My Tonka trucks were built from much thicker steel with a protective lead paint that stayed shiny without wax ?.
Mine stayed nice and shiny. Guess it could have been from the old motor oil and antifreeze my dad would dump in our sand pile to keep neighborhood cats out.That's true as well! Although when I played with mine outside, they did develop some rust.