I have only had this pipe for 1.5 years and I am amazed at how well it is coloring. It was totally white when I started, and I had no idea about meerschaum pipe coloring until after I noticed it changing colors. I have not tried to color it, I just smoke it for a few weeks then is sits for months before I smoke it again. Not because of any method, I just get interested in smoking other pipes and kinda forget about it for a while. It colors so easily that I can usually see changes after just smoking for a day or two. I keep all cake out of it and keep the bowl as clean as possible. I also smoke it constantly without letting it rest, other than overnight. I just load it back up when the bowl is done, and light it up.