i was wondering if i sand my ball to a 220 grit should i leave it dull or
should i polish it up? It's a ebonite big time. what are the advantages vs
the disadvantages of polishing @ 220 as opposed to keep it dull.

grabs earlry, and has no finish on the back end. depends on the lane conditions.

The BigTime is a particle ball. I can't imagine the damage it might do to the lanes if you did sand it to 220 grit and used it. For 99.999% of the bowlers on any condition, 600 grit is as low as you wnat or should need to go, onany ball. If you need more, you're either not using the right ball or playing the lanes the right way.

This is not intended to be nasty, so don't take it that way. If you need that much surface, you either need another ball or some lessons on different releases or where to play the lane for a better ball reaction.
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"...for advice is a dangerous gift, even from the wise to the wise...."
J. R. R. Tolkien

If it's particle, which it is ... have it resurfaced with the roughest scotchbrite (burgundy, I believe) don't wet sand it as it will take the points off of the particles. Polish and or compound finishes after that will depend upon what you want the ball to doing ... for that, I would work with your pro shop and speak extensively about it.
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DAMN, I LOVE this game !!!

Robb in O'Fallon, IL (near Scott AFB)
LAYBZZ74@AOL.COM

The Visionary Midnight Scorcher is 320 grit OOB ... the only ball that I know of that has a coverstock that rough OOB.
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DAMN, I LOVE this game !!!

Robb in O'Fallon, IL (near Scott AFB)
LAYBZZ74@AOL.COM