Here are various states of patina in bronze, copper, and brass in their naked splendor. : r/machinedpens

2mm Disc 24g Copper or Brass or Bronze or Nickel Silver Cutout for

Patinated Bronze Zahner — Innovation and Collaboration to

Hot Patina DVD_Brnz/Brs/Copper

What is Patina and How it is Used with Bronze Sculptures

Hot Patina DVD_Brnz/Brs/Copper

Copper patina art hi-res stock photography and images - Alamy

Patinated Bronze Zahner — Innovation and Collaboration to

Patinating Copper The Metropolitan Museum of Art

Copper, Brass and Bronze Patination – Empire Copper

Patina is a layer that variously forms on the surface of bronze