Just a thought, I had a new MLB baseball the I wanted to use get auto's at the Brooklyn Cyclones Game in Brooklyn last year for my kids. The ball had glue residue on it, was kid of bumpy. Granted my ball has no value, not sure the value of your ball. I put the ball in the freezer for about 15-20 minutes hardened up the glue. Just used my finger to slowly rub back and forth. Glue came right off. This worked for a MLB Ball from 2013 . Just my story, because it's an old ball proceed with caution.
Mike
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