Last year I discovered an etchant that nearly replenishes itself, haven't tried it. It is 70% muriatic acid and 30% Hydrogen Peroxide. However storage in the first 24 hours seems to be an issue as it releases gasses. today I found a vinegar and H2O2 along with table salt solution also works. In the past I found Kepro and Chemelex etchants costly and I abhor Ferric Chloride. Etchants seem to abound, the greatest trick is getting the resist onto the board. I had wonderful success with laser transparencies in the past on photosensitive boards, however I no longer have access to a laser printer or PS boards. Has anyone had any success with the "iron on" inkjet resist? Some say it works. I purchased a "T-shirt" package today, will experiment. If it doesn't work, my bride can make and sell T-shirts to support my electronics habit. Oh, no worry on chemicals, I was a chemistry major when USAF told me to chase electrons through wires, not chemical solutions.