or-- get online and copy a protractor scale. take it into a graphics program (i use coreldraw). size it to the same size washers you have chosen. then make a transfer of the protractor and using transfer techniques, apply to the washers. when they're dry, simply engrave the lines. yer good to go. you won't need all 360 degrees. my grs dual angler uses 5 degree marks. let us know how you make out.