Is that something you do or have done, or is it something you are interested in or collect? I am curious what you would use to etch brass and how long it would take. It would also seem to be a very dangerous process and using very dangerous chemicals that would be hard to dispose of in a safe way. I'm pretty sure that to etch glass they use phosphoric acid, which can burn and also produces very toxic fumes. Is it something safe to do from home of small shop?
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