How about taking the shine off by sanding or sandblasting the surface? Rec Applegate suggested in one WWII era pamphlet that a shiny blade was more terrifying t an opponent than a blued blade, maybe the shine is a virtue. And even stainless steel can rust if you abuse it enough-try coating the blade with mayonnaise and letting it sit foor a day or two-this was the recommended methode for bluing green river knife replicas sold by Connecticut Valley Arms many years ago-
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Dance like you have never been hurt, work like no one is watching,love like you don't need the money.