I've seen 51 Bowman's turn to the consistency of peanut brittle/hard as a rock...could smell the odor of some kind of chemical applied to the card....I don't know but from judging the dealers other 51's of lesser caliber common cards of which many of them had wax stains on the back. I'm assuming some kind of chemical maybe acetone or mineral spirits could have bee used on the back to get the wax off. I wonder if feel and texture goes into account on vintage card grading by the TPG's.
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