I have no experience with such things, but know it was done back in the day. A fellow that shot with my gun club years ago, had an English .60 Cal. half stock mountain rifle ( probably a light safari rifle really), that he wouldn't shoot because it had damascus barrel. After a British gun collector examined it, he was told it was not damascus at all. He was skeptical, and had it professionally examined. Sure enough it was it was all steel, no iron.
I would look into some sort of resist method. I know that circuit boards can be etched at home using nothing more exotic than a Sharpie permanent marker as the resist medium.
Hungry Horse