Please use caution on the direction of the buffing wheel as it will grab it right out of your fingers I recommend using a small vise to hold the pick and use the low speed as it will eat into the pick at higher speeds . I makes even the cheap ones play well I just bought a pack of the larger tri shaped Clayton picks and they feel like they have sand paper on them . but after buffing them the pick glides off the strings so with a minimal effort I have 12 slick picks well eleven as I burnt one LOL . You live and try and learn . I also recommend that you use very light pressure at the slow speed it will buff them well . so for 4 bucks and some effort, I turned 11 into slick picks . I still am waiting on Gustafson to market their new finger picks, I really think the pick will revolutionize the finger picking tools for banjo and guitar. I might make some with heavy duty finger cots and see if they really work as well as they say but it is a good thing I believe that these picks could be out on the market this year.