Jim,
I use a 50/50 mix of Simple Green and rubbing alcohol to clean my Granite Gargoyle and it works just fine. If it can get THAT ball clean, it can get any ball clean! I don't know if acetone is bad for a bowling ball, but I'd be leary of putting anything on my $100 ball that can strip paint! Perhaps you could ask Jason what he recommends to clean your Ogre Particle. He's always willing to help out his customers.
Spike