@dochudson, for many coatings this is true. Some companies, though, not so much. I was new to pipe smoking when I got my first coated pipe, and from a reputable company. I didn't even really think much about it, and didn't know what it was for the most part. My first bowl from that was awful, and I couldn't figure out why. I put a different tobacco in it, one I knew well, still crap. It took awhile to taste right, and that's how I learned about bowl coatings.