Remember that the Dremel, is the straight razor tool of death. you need to be very, very good with one before approaching the razor with it. I use Mother's Mag & Aluminum Polish or Semichrome instead of MAAS, I have a hard time finding it.
I would work the blade with a progressing series of 3M wet/dry paper, depending on the depth of the engraving of course. I am a beginner when it comes to retoring razors, so the pros will chime in soon.