Sandblasting or sanding works for removing the lettering but for Steelseries lasered keys it's gonna take quite a while per key.
Fingernail polish remover works but you'd STILL have to sand and the acetone in it is pretty nasty.Show Image(http://www.overclock.net/attachments/keyboards/215120d1307977507-need-expert-opinion-ridding-legend-ducky-kd4em.jpg)