I recently repainted a portion of my single wall chimney with 1200* stove paint. The first few fires, I expected that "curing paint" smell in the house, but it's been a month and I still get it when the stack hits 550-600. This is the maximum I run the pipe at, but I've hit it multiple times, and each time it goes over 500, I get the smell, and it's just as strong as the last time. Any ideas?