JeffH, I've experienced the same problem with 'old' K&B Super Poxy not curing. At first I suspected the paint, but now I believe that the catalyst is what has gone bad. My solution for this problem was to over coat with a good clear paint, such as Klass Kote, Dupont Chroma Base clear, or PPG clear. In fact, when I painted an airplane with K&B Supper Poxy, that I catalized with Klass Kote catalyst, I just overcoated with a good clear. Greg