I think if it was just a 'sanding to smooth' process, you may find that the recovery is MUCH quicker that Teyko is suggesting.
Listen to your surgeon, and your phsyio, and they'll guide you through it, but from memory when they *thought* that was what I'd have done to my knees they were predicting fast recovery times, and from memory when my physio did have that done he recovered quickly himself.
I'm not going to go into my surgery and recovery as it was very different to yours, as will be the case for many other people too. Remember that there are dozens of different knee ops and dozens of recover times, the good news for you (from my memory only) is that I think your op is one of the quickest to recover from.
Good luck.