[k|ngp|n]

Man I don't know what your experiencing there honda. I have never seen anything like that or know anyone out of all the guys with the new units to see anything like that. I torch THE HELL out of my cpu and gpu units with black tops (multiple times daily lately) Never seen anything like this mang. I think you were burning off some other contaminent that got inside the container or something. You guys should eb careful with mapp gas in general, especially in smaller enclosed areas with poor ventilation as the gas itself is toxic.
On a side note, the walls of the container should never really get hot from torching while benching at all. Torching is typically done at subzero container temps., I don't get that.. are you torching the walls of the container at room temps or something just sitting there holding a mapp torch on it to see what happens when it gets red hot or something?