I've been wanting to experiment with etching metals for quite some time. Recently, I came across a great blog post at Alternative Designs explaining how to etch brass and copper with ferric chloride. I'm very intrigued...planning to give this a try. Ferric chloride has to be disposed of properly when you are finished using it...luckily I have a great recycling center within 5 miles of my house. I'll let you know what happens.
I'd love to hear from you if you etch...what is your preferred method? Contact me and I'll post your advice and sources here!
Hummingbird image etched in copper.