No welding slag/bb burns yet (don't have a welder yet but I plan on getting one soon) but as a machinist I have had my fair share of burns from hot metal chips. Once while running a 3 spindle 5 axis gantry (each spindle is 100hp) rough machining 50 foot long aluminum parts I had an errant aluminum chip land on my neck. Since we we roughing, the cut was very deep and aggressive and the chip was about the size of a quarter... had that blister for weeks. For the record 75% of the heat generated in metal cutting goes into the chip, those little buggers are hot! Another time while facing some tool steel on a bridgeport manual mill, again roughing, and had a near red hot chip hit me in the neck. Instead of bouncing off, it stuck for a second and dropped down my shirt collar, much like Shield Arc, it fell down the front of my shirt while I danced like an idiot in pain. The shirt was tucked in of course and it landed at the waist of my jeans (I was also wearing a belt) and thankfully stopped there and branded the **** out of me right where my pants ride. It was so hot it blistered me all the way down my chest as it fell leaving a trail that went from my neckline down to my waist. Good times?!
Chris.