Patina

It has a nice patina on it.

This bronze statue is coated with patina.

"Casper, do you know what is 'wabi-sabi' in Japanese aesthetics?" "David, I don't know." "Well, it's the appreciation of beauty that is imperfect, impermanent, and incomplete. Some examples are the moss that grows on rocks and tree branches, and the green patina on a copper teapot." "It sounds like a complex concept." "Actually, one of the characteristics of 'wabi-sabi' is simplicity."

he enjoys a patina of respect by the police, despite being an ex-criminal

It demonstrates how scientific authority could be constructed on the fly, as it were, by someone with no connections and no psychological credentials who offered a technique that had the patina of modern science[…]