I've noticed that some old Gillettes, the fat handle Tech for example, show up in a Brass and copper combination from time to time, in addition to the usual silver and gold. Does anybody have any comment on how durable or easy to clean this finish is? I am assuming that it is coated, like the gold razors, and thus would not be amenable to heaving scrubbing of any kind? I kinda like the fact that the silver tone razors seem to all be just some form of metal plating, which can be freely scrubbed and polished, but all one color is boring, no?