Weld through primer?

My cousin welded galvanized and did alot of welding indoors and would always use these products. He was diagnosed with cancer, he felt sick after work three days after thanksgiving. He was told christmas eve he had 7 day's . He died Christmas at 7 PM. He looked healthy and normal up until thanksgiving. The day before he went to the doctor we were sitting at my kitchen table having Coffee and eating smoked turkey. He said he had a pain in his side like a musle sprain I told him to get checked out for a hernia. . His name was Michael Kiss he was 48 years old. he left 2 daughters and a wife behind and many many freinds. Please take my advice an use these products in a well vented area. It stays with you and never stops attacking your body. It will win, it waits until you can't fight back!! I know, and I cherrish everyday I have. When your at work and you watch the clock, time goes so slow, But when your with your loved ones and want it to never end, time goes so fast. I just want it to last longer for all. Steve Kiss 56