Wiktionary
patinate
Having a patina. v
1 (context transitive English) To coat with a patina. 2 (context intransitive English) To become coated with a patina.
WordNet
Usage examples of "patinate".
She walked slowly through the arched gateway and past the patinated sign proclaiming her entrance into the Heavenly Meadows Cemetery.
The peaked roof was sheathed in copper that had patinated to a dark turquoise green.