I just tried to clean a GBD estate pipe that I bought from a reputable pipe EBay seller (100 % rating) and when I ran an alcohol dipped pipe cleaner down the pipe stem, some Everclear dripped onto the outside of the stem. Before I could get a rag to it (less than a second), it bled black color all over my hand. It looked like diluted black felt marker color on my hand - that kind of purple/black color. I immediately wiped it with a soft cloth with more everclear and proceeded to wipe it until no more black came off. The stem appears ok, a little faded now and is/was fairly clean on the inside. I am now going to sand and buff this stem before I smoke this pipe just to be on the safe side. Anyone else ever run into this? Have I just run into an old horse-trading trick or is this a common event?