These synthetic wheels really perform. I use the 3M and the Norton brands. They come in coarce, med, fine, and xtra fine and their many uses make them handier than someone doing your hand sanding. I find that by running these wheels at slower rpm will add greatly to the life of the wheels. By using the correct rpm and wheel, you can clean, debur, sharpen, and polish. You can even add rouge to the wheels and remove deep grind marks. They save me many hours of hand work.
Ken (wwjd)