I have one sanded up to 1000, then polished A LOT! Doesn't take the polish too well, but it does get shiny.
The result? A great ball that can still handle a substantial amount of oil, but won't hook on the ball return before you pick it up. A fantastic ball for playing up the edge hard because of no over/under.
Play with the cover, and I'm sure you'll find something you'll like, just don't try to get a mirror shine on the sucker
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Andrew Phillips
The Tenpin Bowling Discount Store - Moonah Bowl
Team Bowling Balls Australia - Visionary Staff