Tugger,
When the XTra Shine bottle said it was "3500" grit, that actually measn that the higheest grit and the most shine you can on a ball with that polish with LOTS of polish, with LOTS of pressure, with LOTS of time on a SPinner is 3500 grit. If you just put a glob on the ball and pressed with a clean cloth for 2 or 3 minutes, you might have a 1500 grit shine.
That "3500" grit is maximum potential, not every application.
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"None are so blind as those who will not see."
Worrying is like rocking in a rocking chair: it gives you something to do, but doesn't get you anywhere!"