weird honeycomb pattern after plating

[rcvinyl]

Hi Everyone
After being sent for plating, this kind of honeycomb pattern appeared on the outside of the lacquer. Has this happened to anyone? Although it is not very common, it happened once last year and once this year.

[Aussie0zborn]

Does this same pattern show up on the stamper?

[misjah]

Looks like sparking

[rcvinyl]

yes show up on the stamper as well, only appear on the lead in area

[Aussie0zborn]

Looks like “chicken feet” or “worms”. These usually show up in the lead-out groove area. It’s caused by organic impurities in the galvanic plating solution. A good carbon treatment will resolve that.