I have been working on completing a set of patina and texture sample tiles for the Mesa Art Center in Mesa, Az. I love color on metal and will try anything to make this happen. The smell of ammonia is no stranger in my studio, or how bout the aromatic scent of rotten eggs via liver of sulpher... ahh the beauty of it all.
The close up is of liver of sulpher with gesso on top, then there's gesso with cupric nitrate on top, a piece of opper with vinegar and fumed in ammonia, and copper etched with pnp paper in the back... The following show peanut oil, ferric nitrate over gesso, and fumed ammonia with salt. I had a lot of fun making these, and am happy to pass them on!