Phosphoric Acid

I’ve been experimenting with phosphoric acid as a rust remover and as a tool for coloring the steel. Here are some photos of the bed of the guillotine after some phosphoric acid treatment.

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I may do some more washing and scraping to see if I can get all the way down to the steel, but I am enjoying the colors that have emerged thus far.

Also, since phosphoric acid is an ingredient in Coca cola, a can of it can come in handy if you need to remove some rusted screws.

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