Birchwood Casey Presto Gun Blue Touch Up Pen For Nicks & Scratches BC13201 Presto Gun Blue Pen-The Presto Gun Blue Pen quickly and easily penetrates hard steel and gives a durable blue-black finish that won't rub off. use like a marking pen for one-coat coverage on non-stainless steels. Store the pens with the tip down to ensure the fluid does not collect in the bottom.
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