I have been coming to this site for years, but finally purchased my own 18.5, and did my first smoke a few days ago. When I was cleaning up afterwards I noticed the finish was coming off of the bottom of the water pan. I followed the Mr. Brown recipe word for word. The pork was the best I've ever had, but I'm assuming the water pan shouldn't be doing this? I didn't have the charcoal piled so high the water pan was resting in it or anything.