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Look into electro-etching, sometimes called electro-chemical etching. The process involves an electrolyte (like salt water), a nine volt battery, and the metal.
For a cheap method, you can use mustard to etch a blade as shown in this video https://www.youtube.com/watch?v=hfRO1GbvOvA and likely many other sources you can find on the internet
This may help.
This looks do-able, and I will not be using more dangerous liquids. I think I will test it on some scrap material. Thanks
What kind of steel ?
Try these Instructables all of them have etching including the one on making a knife and the one on making a sword:
All of My Current Handcrafted Knives
Personalized utility knives using a laser
Cherry Pi Knives (Cherry wood pie knives)
Make a knife holder without nails
DIY Heavy Duty Craft Knives/Scalpels/Exactos/Woodworking Knifes/Carving Tools/ETC
How to Sharpen Knives
Changing the Cutterhead on your Jointer
Using sugru for a custom surgical knife guard
Knife Block -- Free-Standing
How To Make A Stonewasher
Posted:Jun 22, 2014
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