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Green verdi and blue verdi patina solution

Can someone give me a "recipe" for the mixing of what chemicals to spray on reactive metallic paint (or metal) to produce the green verdi and blue verdi patinas? What name do I ask for and what strength? I am assuming that it comes in a powder of crystals that I will be mixing with water. Thanks. Some of the search engines have given me such names as liver of sulfur ⇦ this on eBay or Amazon [affil links] , tourmaline, copper sulphate ⇦ this on eBay or Amazon [affil links] and ammonium sulphate ⇦ this on eBay or Amazon [affil links] .

Paulette Esselman
Extraordinary Walls - Grapevine, Texas
2005

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