"patinas" in the noun sense
a fine coating of oxide (produced by oxidation over a long period of time) on the surface of a metal (particularly copper)
an acquired change in the appearance of something (other than metal or wood
"a patina of frost"
"a patina of good breeding"
a gloss or sheen on wooden furniture produced by age, polishing, or handling
Source: WordNet® (An amazing lexical database of English)
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