The type of particles Brunswick used/uses are so hard that ScotchBrite will not affect them. When you want to change the surface of their balls or you need to re-surface them, you want to change the particles as well as the resin base. Trizact will do the job. Scotch-Brite will only scuff the resin, not the particle.
Many other companies use softer particles; when you need to change the surface, sandpaper or Trizact will sand these particles smooth; this can create a virtual resin ball out of a particle. So it is/was safer to use ScotchBrite pads.
That's the theory, I got from hearing and reading and learning. Also some experience with Brunswick and Lane#1 particle balls. Whether new B'wick particle covers are different or not, B'wick says they are and current users seem to agree.
