More mud.
The ball polished or not, needs to absorb all of the oil that has attached itself to the ball surface to be effective.
A polished ball will attract just as much oil off the lane, assuming it is played in the same area of the lane.
The potential difference compared to a dull ball, is a polished ball tends to be thrown where there is less oil.
The net effect is probably less oil into the ball, but not because polishing the ball changes the absorption characteristics.
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