If I put sandpaper around sharpmaker rods as an angle guide (I couldn't maintin an angle to save my life on a flat surface),secure it so it doesn't slip, and sharpen it that way,would it work? would it mess up a knife? What type of sandpaper would I need? and what grits should I use from start until finish? Note this is not a mod to the sharpmaker but only temporarely useing the rods as an angle guide with sand paper taped to them.