Sharpening Guide I use sandpaper to sharpen my chisels. By "sanding" the bevel of the blade flat and smooth, it produces a sharp edge in just a few minutes. The problem is holding the chisel at a consistent angle as you sharpen. To do this, I clamp the chisel to a simple sharpening guide (see photo). As you can see in the drawing at the right, the guide starts off as a pair of wedge-shaped support blocks that hold the top at a 25° angle. To square up the chisel (and keep it from shif
