When those balls came out, I believe the recommended proceedure was to sand with 600 grit, then use 3m rubbing compound to bring to desired finish. I did that with mine when I had it & it did increase length. The surface on those balls for some reason was touchy, so be carefull what you use & how shiny you make it. If you decide against the rubbing compound, then I would go with the brunswick polish.
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Wayne
Hardcore FOS