no expert here , but this is what I have done with a bit of sucess.
I had scratches from me learning to sharpen on a few different knives. Some were down closer to the edge and I was able to just go up through my stones to 6K and get those out with work (the work was simply making the finish appear even, not getting the scratches out).
The rest I did a couple of things. One I used jons erasers on and then used flitz, the others I actually used different compounds on a felt strop and just polished the entire blade edge. I have a few different diamond spray from my razor kit and that worked really really well.