marcmarc
As Ko.Fe. pointed out, it's not likely to be a big issue until you go to sell the camera.
So it can't be "cleaned". But there is a way to get it fixed.
If you have the budget to send it to CO to be re-surfaced and re-coated, and you want to do it... you could.
If this is going to be the one camera you use, it may be worth it.
But if Harry recommends against it (because it's minor) and if you don't see it in your pictures... you don't have to do it to make the camera "more valuable".
Just do the polish and recoat operation if you think it will make the camera "more useful".