Hey Berreez,
Vasilis is correct, I was informed by Del and Brian that "Mega smooth" is a 1500 finish. Chuck G likes it 1500 wet sanded, probably helps keeps the pores a little more opened up.
I agree with your thoughts, have your friend try sanding the ball down to about 600 and see what reaction he gets. Pretty hard for a full roller to really turn over as it is, plus his lower revs doesn't really help that fact either. Keep us posted, like to be as much help as possible.
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Rick Leong
Ten Pins Pro Shop
Track Intl. - Amateur/Pro Shop Staff
Vise Inserts Staff