Ferric Chloride works good, it is circuit board etching acid also what you would use with Damascus steels.
Well I can tell you where you can't get it. Not much help but will save you the trouble of looking there.... Circuit city. The old radio shack. It used to be sold there but apparently they stopped carrying it. I've tried about 5 different locations and had no luck. I'm still looking if I find a spot I'll let you know. The last thing I did an etch on I used a mix of heated viniger and hydrogen peroxide. Some little mix u saw on a forum somewhere. Light etch but it definately showed what was there. Some just use lemon juice and polishing.
If you guys are looking for ferric chloride the best place available now is B&E Electronics....you can order online or just give them a call
I'm going to try active surplus and a few other stores. So I'll post if I'm successful or not in finding any local to Toronto. I think I'll also try lemon and white vinegar( not together) as well. Thanks for all of the information and help once I find what I'm going to use and actually use it i'll post my results, good or bad
So I haven't made it to active surplus yet, but I did find a place called Sayal Electronics. They have stores in Toronto, Mississauga, Burlington, Markham, Vaughan and Cambridge, and they sell ferric chloride. I'm going to try lemon juice and vinegar first but if they don't work then at least I know where to buy ferric chloride.