There are a few things to bring up the luster. Some blade material will get a higher luster then others. I find 440 SS will polish up easier then something like S30V.
Rouge would be used on a buffing wheel or your dremel with a cotton bob would also work. The buffing compound can be purchased at Lowe's, Home Depot, Harbor Freight or on line.
Semi-chrome or Fitz are a very fine polishing paste you can use on a cloth, or your dremel cotton bob when you are at the end of your buffing.
Use the emory (sand paper for metal) and increase the paper number till you remove the scratches from the the lower number paper. Don't start out with too coarse a paper if you don't have any scratches to remove or you will end up putting scratches in the metal. Sometimes the stonewash finish is put on a blade so buffing doesn't have to be done and it also will not show the scratches that you will get with a high luster finish. Remember the mirror finish will show scratches quickly. Good luck with this project.