Cartier Santos polishing

[Carterman32]

I have a Medium Santos wsa0029. I lost a lot of weight but didn't change out the links to make the bracelet tighter. As a result, the watch flipped around my wrist and was hitting face first into hard objects. I know. Stupid.

I scratched the bezel up badly. I went two local watchmakers in LA. One said not to polish it because it can ruin it from being water tight. The other said Santoses can't be buffed and need to be sent out (not sure what would be happening at an external watchmaker).

Is it true they can't be buffed? And if so, what's the best course of action. It's just the bezel that needs work. I'm especially bothered by the gash in the upper left hand portion of the bezel.