Ages Metal, use on buttons to take off shine. Go from new to old quickly with the Presto Gun Blue Pen.
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PENETRATES HARD STEEL INSTANTLY AND GIVES A DURABLE BLUE-BLACK FINISH THAT WON'T RUB OFF
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USED TO TOUCH-UP NICKS AND SCRATCHES ON BLUED SURFACES
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NO HEAT REQUIRED
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REACTS QUICKLY WITH USUALLY ONE COAT NEEDED
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