I know this sounds crazy, but it works. Roll your pickup window down 'till about 4 or 5 inches is above the door and pull the guthook down the length of the glass. Auto glass is laminated and will work like a fine crockstick! This trick is also good for touching up the edge on your skinning blades as well. It will also sharpen your serrated knives.
'Remember, if your're driving, don't forget yer truck!'
