That's fine if you have both the machinery and skill to use it! I would like to inform folk it is so easy to round sharp edges and loose the original profile..........very quickly.
Using various grades of wet or dry paper, a piece of wood with metal polish and finally a silver polishing cloth will result in a black polish finish. Using this method (it does take some time) there is far less chance of damaging original profiles. More importantly, by using this method you can carefully reclaim profiles that have been damaged. I have seen more damage caused by folk using buffs that anything, and not always by amateurs.