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The gubmint doesn't trust mere mortals with nitric acid any more. It has become very hard to get, and when you find it, very costly with exorbitant courier charges - more than the HNO3 itself!!!
Ammonium nitrate - good luck. You can make things go boom-bye-bye with it. Therefore, we aren't allowed to have it easily.
Sulphuric acid is hard enough now to get too.
i use HNO3 and H2SO4 a lot in my hobby of firearm restoration. You make rust blue solution with these 2 combined, plus some other ingredients. I have to buy 3 litres of each... adds up real fast
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