When creating my Recycle With Style™ earrings, which were featured in the earrings, earrings, earrings! book by Barb Switzer, it's important to remove the sharp edges from each pull tab. In the book, I recommended using a metal file, but if you want to speed up the process, use a Foredom Flexshaft or Dremel rotary tool. I usually polish each pull tab individually, but check out the cool contraption my dad created so that I can polish several tabs at one time. He's a genius! He missed his calling as an inventor. Although, it's never too late.