how to etch your steel

Nice, but you can also just use nail polish... and scrape it off with a metal tip, so it's like actual writing/drawing.
 
Old DC power sourced work too-- think old phone charger. They may take a little longer because they usually run less than 1A. I'll have to try the vinegar and salt solution. I usually use some ferric chloride etchant.

Ric
 
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