1000 grit wet dry sand paper , glass shelf or a piece of flat steel , mark the edge to be sharpened with a magic marker ,lay paper on glass or steel grit side up, place the edge on paper inside facing you push away from you only . Making sure you are removing maker as you push evenly creating a burr on inside edge . When burr has been achieve evenly . Push the blades apart with fingers after closing open with blades rubbing together forcing the burr out .then cut light paper removing the burr .or rub the edge against tight jean leg or leather strop to remove the burr and polish.