Cutting a tin can in half can be hell on some edges. On some of the other knives I've done this with, it has rolled the edge significantly, to the point where steeling it back straight wasn't possible. Same thing happens on some knives when cutting through wire. (I know there's no reason to cut a tin can in half. It was a curiosity at first, and this recent one was just to show someone it was possible with a pocket knife. Similarly, I know cutting wire is better suited for a wire cutter, but sometimes you just make do with the tools you have on hand.)