Acid Etching

[Oberu]

Greetings,

I put this in the wrong place originally, I apologize. I'm making a dirk and wanted to acid etch the blade and some of the brass fittings I've made to give them a little more detail and zing. Has anyone ever done this before? I've used acids to remove galvanizing from wire when I've made chainmail and the like but never etched anything on purpose. I have asked around and looked where I can to find information but I thought maybe one of you could point me to a good reference possibly. If not I'll go at it in my usual method.. experimentation . I appreciate any information you can give me.