I got a M-series 16610 and the extension link shows 4 "white" tarnish dots as pictured below

It appears something had "eatened" into the metal and cannot be remove by any solution.
This is the SECOND time it happened. One year + back I broughto RSC and they poshished off and sying is a lock-tight solution/residue caused it. But now it come back AGAIN!
RSC bull-**** me I think. Anyone seen such defects before on the extension link ?
Also do they have a replacement for this link only (i.e. not the whole bracelet) ?

It appears something had "eatened" into the metal and cannot be remove by any solution.
This is the SECOND time it happened. One year + back I broughto RSC and they poshished off and sying is a lock-tight solution/residue caused it. But now it come back AGAIN!
RSC bull-**** me I think. Anyone seen such defects before on the extension link ?
Also do they have a replacement for this link only (i.e. not the whole bracelet) ?
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