When I first started pressure washing I was working for a chem company. One of the demo chems I carried in my trunk was a rust remover, which was HF based. so I looked it up to see how it related to pressure washing. When I came upon all the horror stories about HF I emailed some to my boss. He said "we tell you to use gloves" and just demonstrated a real lack of concern that we carried all these demo bottles around with out any real safety training. I decided right then and there that that wasn't a company I needed to be working for and went full time into PWing.