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Just as an FYI, the etching only occurs while the electrical current is flowing. Once you lift the Q-tip, the reaction stops. That being said, it depends on your voltage, metal, and electrolyte concentration in your acid. Mine only took a few seconds. I highly recommend testing the process in...

take pictures!

Just a spare cord from some old electronics.

Approx 1/4 cup vinegar to 1/4 tsp salt worked for me, but honestly I didn't measure, it just worked. Don't worry too much about the ratio. If you know you have a good circuit and it isn't fizzing, try more salt. In theory it should work aluminum, but it might require a different electrolyte.

This method uses electrolytic acid etching but requires nothing but cheap household materials! The hardest part is taping off where you want the marks to be. This works by actually removing metal only where the current flows. 10 gallon kettle, completely bare. Ingredients: All you need is...

added links to the parts list since a lot of people asked

It connects directly as one end of the splitter is a 1/4 inch flare female swivel nut. Otherwise if you had an all male end splitter you would have to a coupler

Forgot to mention you'll want the little nylon washers too

This is a much simpler way to hook up a Beer Gun or Counter Pressure Bottle Filler. The problem is that in order to use these bottle fillers, you need to have CO2 hooked up to the keg and the filler at the same time. In order to achieve this, most places will tell you that you need to modify...

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