Sure, a bare brass razor won't rot like a Zamak razor, but they plated brass razors for a reason, I still prefer to have the original plating or replate the razor. A bare brass razor certainly won't last as long as a plated one. All the heavily pitted razors out there prove exactly that.
Most of the pitting I've seen was the result of plating failing unevenly, especially peeling or blistering. Water gets trapped under the plating and causes a problem. A bare razor that is actually used will turn brown but not pit. Why are you arguing the plating point, I was offering brass as another alternative of razor material that is a better choice that Zamak?