I bet with a service and a new hesalite crystal it will look amazing. All personal preference but since it is sentimental I would consider leaving the current bezel as it is, each one of those knicks has a story. My Speedy (ever so slightly younger) says hello.
And dont get it polished!
Try to find a local watchmaker that works on Omega. It’ll be much cheaper and you’ll get a better result than returning it to Omega.
People here will gladly share recommendations as well.
I'm going to take a different tack and suggest you replace the bezel with a suitably aged used one, the existing one seems just a little too far gone. As long as you don't chuck the original one away, it can always be included or re-fitted in future should you need to, you won't have lost anything.