I have a question that I have asked myself for years. Now I have the forum of knowledgeable people to get good, varying answers from. Why would you alter the surface of a bowling ball when most manufactures's make a complimentary piece of equipment of the surface you are trying to produce? I have saeen people shine a dull ball, and sand a shiny one, and they seem to lose something in performance. Since most of us own more than one ball(LOL), I would think picking up the complimentary ball would make more sense. When I look for new equipment, I always look for the other piece to compliment this one. Unless of course I am looking at a unique shot or a one time use ball and need something to fill a gap in my arsenal for a short time.