Been there, done that with reporting an employer to OSHA. Oddly enough, it was related to metals as well. But, my previous employer was mixing chemicals into the metals to make it easier to cut. After an entire month of swollen tonsils that antibiotics couldn't help, my doctor asked them what chemicals were they using and they refused to answer. It was then that my doctor and I both reported them. They were fined heavily. They didn't have a Material Handling book so I still don't know what I was exposed to.