Touch up paint

[Ocraknife]

Well... except for the safe part. That would have to be a really big safe.

 

[Walt Sherrill]

Based on the definition I cited above, RUST could also be considered Patina.

That may explain some of the cars we see: people are just using them...

 

[James K]

As the term is usually used, patina is rust, or rather a mixture of rust, dirt, old oil and grease and the residue from years of handling by sweaty hands.

Jim