3% Food grade (tannin) tannic acid powder, 10% phosphoric acid (Naval Jelly), mixed with distilled water.
Blue / black - bonded to the steel ...
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Thoughts on current events, including but not limited to, the computer & automotive industries; British, American, & World politics; Space Exploration; and the military. I don't claim to be an expert on anything, and I'm not receiving any revenue from this blog. Comments are welcomed but I'll delete any I find offensive or any I determine to be off-topic or some form of advertising.
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