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For Dirky! DIY electrolytic metal etching with 9V batteries


djnumnuts

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In to 80s you were encouraged to etch your social security number on things to deter theft like bikes or tools. Of course now with identity theft you are never supposed to. A older coworker said he etched every tool he owned and now has hundreds of screwdrivers and tool with his ss# on it lol

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