Steve Hobely was out of "Ferret Chloride" and "Bureaucratic Acid" and needed to etch a circuit board. What did he do? He grabbed some vinegar, some hydrogen peroxide, and some table salt and concocted a new etchant! He explains the recipe in this post, complete with a detailed description of the reaction by his Ph.D-in-Chemistry sister.
Looking forward to reading more of your articles in the future.Go for it.