back 20 years ago i had or still do harding of the bronchial / lung tubes . that i lived with but started to get colds i could not shake. guys that had been in it abit longer them me i would ask them if they had the same thing going on? nope.. but both did get sick and now not doing it full time any more most guys i know now are not painting any more. as soon has you get really good at it you get to old or sick to do it any more full time . i have been sick from the two part paints. when i get home i could feel the blood pump thru my arms and my lugs my heart was jumping .if got a good shot may ears would burn my lungs would fill up .a bad trip