Presto Gun Blue Pen: Essential Tool for Framelocks and Firearms

Here's a review and "how to" video on a great product recommended to me by a viewer. It's the Presto Gun Blue Pen. It's designed to be a touch-up product for gun bluing, to fix scratches and worn areas. But not only does it excel in that application, but it also performs some magic on titanium framelock knives. Check it out...