I could have sworn that Chitown commented on this very same post, earlier in the day. And I think he said, the smart thing to do, was to take the surface down on one of your existing balls, like to maybe 500 grit, and then repolish with 1000 grit polish!
Altering surface is always a lot cheaper than buying another ball.
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Duct tape is like 'The Force'. It has a light side and a dark side, but it still holds the universe together.
Some days you're the bug; some days you're the windshield.