Whether I had a plated brass or a plated zamak razor, the truth be told is that I would toss it and get a new one if the plating were to deteriorate, given that replating is an expensive proposition. This of course assumes no manufacturing defect, in which case the manufacturer should stand by its product, and also that the razor is of the more standard production type, such as a Merkur, EJ, Muhle or Fatip, as opposed to a luxury razor, which would likely be stainless steel or some other unplated metal in any event. If I am not off on this, then the quality of the plating is far more important than the composition of the base metal. In which case, is zamak really something to focus on?