I have a bunch of galvanized steel circular punch outs from your standard electrical boxes and I wanted to turn them custom coins for personal use by etching a design into them. An engraving tool didn't quite work so I suggested chemical engraving. I've tried both white vinegar and metiaric acid solutions with a 9volt setup but neither manage to get actual depth, just discoloration in the pattern I've put down.Is there a better chemical to use, or should I get a car battery to up the voltage?Alternatively: what's the feasibility (and if feasible best method) to melt them down to pour? I've seen a sand\clay mold method I think I can replicate if I can get the metal molten.Pic is the setup I had for the vinegar solution.
>>2945361>galvanizedNo. Just no. You'll have a lot better luck casting aluminum but sand casting is very rough and fine details are not possible. Look in to die striking but if you can't etch a coin you aren't going to manage making a die. 3d printing is a great way to make coins, even with a single filament machine you can make nice coins. The zinc blanks, again, not worth the hassle of working with.
>>2945385>but sand casting is very rough and fine details are not possibleHoly skill issue
>>2945385> >galvanized>No. Just no.Is that no to just the etching or the casting as well?
>>2945400Zinc plated steel, aka 'galvanized steel', is not going to give you a good result.
>>2945412Just sand the zinc off, doofus.
