If it has 50-80 games on it, use a maroon scotch-brite pad with Clean and Dull. USE A RUBBER GLOVE and follow the directions EXPLICITLY!
Then sand to 600, 800, 1000 and then repolish to the original gloss.
Unless your local pro shop has Ebonite's Hook Again system or the Rejuvenator, sanding with Clean and DUll is the next best thing you can do. You can also try Columbia's CPR system; I tried it but then I didn't need that ball agan. SO, I can't comment on its effectiveness from a personal use standpoint. I am pretty sure, it's better than Clean and Dull by itself. The Clean and Dull method, by itself, won't do as good as job aa the other three, but it's much better than nothing.
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Bowling: Wish I could help me as much as I seem to help others ...
Life ... is what you make of it. No, really!