How do you use patina in a sentence?

Here are some examples of how to use "patina" in a sentence:

* The antique bronze statue had developed a beautiful green patina over time. (Describing a natural patina)

* The artist applied a chemical patina to the copper sculpture, giving it a weathered look. (Describing a man-made patina)

* The leather jacket had a rich patina that spoke of years of wear and adventure. (Figuratively describing a patina)

* The patina of age and experience gave the old man a certain gravitas. (Figuratively describing a patina)

These examples demonstrate the use of "patina" in its literal sense (a surface discoloration) as well as its figurative sense (a quality or appearance that develops over time).