Despite the fancy title this is just a old rusty manure spreader. The toning was the result of a reverse toning, solarization accident I came across one day. They toners involved were Iron Blue, Sepia, and Agfa Sistan. I wrote down the steps but I cant find were I put them. I think it was Iron Blue, Bleach, Sepia, and then Agfa Sistan were the solarization took place, but I'm not sure of that. I may have used the blue toner twice. I need to get some Iron Blue toner and try it again.