Never had a problem with metal it’s been used on after it’s dried. The problem is when the liquid or mist get hit with UV rays from the arc. The situation I was in was fans blowing on me due to it being hot and I was using the air-arc, hot combination. Brought the mist and fumes to me. Running 3/8 rod at 550 amps produces a lot of light to cause the reaction. The chlorinated solvents themselves isn’t a problem, it’s when the UV hits it it turns to phosgene which is a problem. I’ve read that by the time you smell it it’s done got ya.