"Age-ing" a nickle magazine???

[sheepherder]

Originally Posted by George Anderson

Forty-eight hours submerged in a can of human urine. It works like magic on steel and brass.

... ...

Now, I've heard that ancient Japanese swordmakers hardened/tempered their swords in urine of different animals...

Does urine 'spot' the nickle magazine shell, or discolor it, or what??? is there anything you should drink to improve the effectiveness???

(I can see this thread is going to spiral out of control any moment now...)