Yesterday - really bad day weatherwise - I learned to etch on copper and brass. Loved it! Would like it even more if it didn't involve dangerous chemicals.
My images aren't that terrific, but I think it gives an idea of what I've made. I'm still patina-ing a few pieces, finally managed to find green patina.
I hope to do more once I manage to track down ferric chloride locally, or as close to local I can find.
I probably should mention that all the ones shown in detail are done with rubber stamps.
And, no, the last one is not a self-portrait.