Buffing is done with light buffing compound or with 10,000-40,000 grit so it can only remove light haze but not any significant amount of glass. The pontils are untouched, the marble is the original out-of-round, and the original creases and surface waves are still there.
When collectors say a marble is polished, they usually mean it has been through sphere grinding then polished. The pontil marks were removed. The pontils can be restored to some extent, but they never look like the original pontils. They simply rough up the marble where the pontils used to be.
Not to hard to tell the difference on a handmade. Much more difficult for machine made marbles.