I use plain old silica sand (white stuff) in a sandblast cabinet with a vacuum hooked up to it to keep the dust down.
You will see the chrome spark as it comes off. Good indication as to when all the chrome is off. You will also be etching the nickel under the chrome and removing most of the corrosion doing it this way.
After sandblasting, drill out that little vein of corrosion thats in the middle of each pit.