I have had a lot of practice over the years, so I fear a might leave out an important step and get blamed by somebody. If you ever give it a try, start on a cheap knife and always do it by hand, checking results often. As long as you do it that way, almost anything can be undone. In the case of the knife above, I used small strips of 600 grit sandpaper wrapped tightly around a Super Eraser and the back side of the blades resting on a second Super Eraser. Using light pressure, work in one direction from the tang to the tip until it all looks uniform. It should not take very long. Then I used Scotchbrite Ultra Fine to give it a little more luster, again in one direction.
I taped the bone with painters tape and used the Super Eraser ( mild abrasive) across the bolsters and shield to matte them down and then gently buff it by hand briefly with 0000 steel wool to get the sheen I like. Finally ..... you only want to change the finish, not remove a lot of metal. It probably took me almost as long to tape up the bone and shield area as it did to change the finish ....... again not a lot of time. Sandpaper not used on the bolsters and shield.
Fingerprints are nearly invisible with this finish versus mirror finishes.