Thanks briarfriar, very informative. I had 3 Charatans as a teenager 55 years ago. They were beautiful pipes but the taste was poor. According to the video they did not stain and wax, but used linseed oil. That is a drying oil that forms a somewhat hard surface. It is not porous as far as I know. The linseed oil may have been the cause of the not so great taste problem.