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We already make etching solution from HCl and H2O2. You've got to be
careful of the vapors and only etch in ventilated areas, but the
solution will reactivate when more oxygen is pumped through it. I like
using it more than ferric chloride.
Speaking of which, I made a new etchant tank for the space. But the
Anyone have an aquarium pump they could donate?
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