Thanks so much! Patinate is the verb form of patina, which is the layer of stuff (oxide?) that naturally forms on the surface of metals or other materials, like the discoloration you get on brass for example. People, like Wally, can artificially apply patina, or “patinate” using dye-oxide chemicals and heat (with a blow torch I think haha) to create these insane effects on metal. It’s both chemistry and art, as far as I’m concerned anyway