I marvelled exactly how patination is both art and chemistry; regulated oxidation, acids

https://positive-ceres-12b.notion.site/Finding-out-about-development-and-contraction-made-me-respect-slots-slip-joints-394be331acf18084b44ae9d4cbce66c7

I was surprised just how patination is both art and chemistry; controlled oxidation, acids, and waxes develop living finishes that progress with climate yet continue to be protectively sealed.