I had a strange experience. I was in a pipe shop the other day and a pipe caught my eye. I decided I wanted to investigate purchasing it. I was examining it and it looked great. No fills on the inside of the bowl, well drilled and it had a 4 mm airhole (something I wanted to try) i asked permision from the gentleman helping me to take a draw from it. He said yes and when I did I got a bad taste in my mouth and the stem instantly "oxidized" for lack of a better term. I had not had an experience like this before. The gentleman helping me took the pipe out to his shop to buff it but the oxidation would not come off??? He also put some dunhill stem restorer on it and tried to rub it out but it did not work. Do any of the more experienced members here have any comments. I did not purchase the pipe and will not be in the area of the store for some time, the gentleman helping did say he would investigate and try to correct the issue. Intersted in peoples thoughts...