All - Google is so wonderful : http://www.instructables.com/id/Stop-using-Ferric-Chloride-etchant!--A-better-etc/# Pool muriatic acid, drug store hydrogen peroxide 2:1 for etch-ant. 2 per hydrogen peroxide: 1 part 35% muriatic acid Suggestion to use a sharpie / permanent marker for "resist lacquer" . Hutch