I have mentioned this exact issue in the past when talking about old worn Metallic Gold chips, but I was just pooh-poohed.
I sold about 80 Metallic Gold starburst solids a couple of years ago which had all kinds of weird pitting on some of the rolling edges, but the faces were in good shape. The pitting I was told (iirc) was a production flaw, not due to wear.
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