None of it's good for ya grinding discs probably killed more
guys than anything they had a lot of asbestos in them.Sharpening tungsten without a mask is really hard on ya over time welding stainless killed a lot of welder any of the exotics are real hard on the body.A lot of the cancers and poisons get absurd thru the skin as well,welding with a t shirt on and no protection for your arms is dumb.
Sorry about the post but my iPad has a mind of its own lol