Here are links to more information, supplies and tools to use in electrical etching of metal for jewelry.
Ready Stamps have your own rubber stamps and matrix trays made
Reactive Metals Studio sources for PnP transfer paper, metals and supplies
Rings & Things PnP paper and jewelry making supplies
Rio Grande sheet metal and wire, tools
FDJTool metal, patinas and tools for jewelry and crafts
Etchers Anonymous is a private Facebook group with wonderful info and people. Ask for permission to join.
patinas at Rio Grande patinas
http://www.sculpturedepot.net/clay-wax-tools/product.asp?Patina_Dry_Chemicals other patinas/chemicals