This is only at the very beginning of the first burn. Don't do the burn-in where the smoke could be blown into your house or to other people, it really smells toxic and probably is. You can see the smoke outside the chimney. It's from the coating of the cans burning off. Soon after, the same started to happen with the ammo box, and the thing looked like smoke was coming out everywhere. In reality, it was only the paint burning off. After fifteen minutes, that died down, and soon after it burned totally clean, without ANY smoke whatsoever (unless air intake is closed too much).