That would be best to ensure you get all of the factory polish off the ball. If you started right at 4000, you might leave some. Carl told me to even start at 500 if I wanted to change the UpRising surface before I used it. I actually liked mine the best on THS with the box finish. On flatter patterns, 1000 or 2000 worked well.
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Louis Franzetti
Track Regional Staff Member