dark spot on gucci canvas

  1. This is my bag from a few years ago and underneath the gold buckle, there is a dark spot, maybe from the tarnishing of the hardware. I asked Gucci, they said bring it in, we'll send it out for an estimate, etc. Is there an easy way to clean it or do I have to do the whole procedure, etc. Thanks.
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    july3-06 007.jpg
  2. I say bring it into gucci cause with the web if you rub it to much it starts to fuzzy up