I was surprised just how patination is both art and chemistry; managed oxidation, acids

https://www.livebinders.com/b/3716838?tabid=c7286a69-2b6c-d3ff-e7f2-9ab1e5419d1d

I was surprised just how patination is both art and chemistry; regulated oxidation, acids, and waxes produce living finishes that develop with climate yet remain protectively sealed.