Quote Originally Posted by JimR View Post
Well, you have sufficiently scared the poop out of me...
Anyone have any idea at what speed this becomes a danger? I mean, hand sanding steel is safe with just a mask, right? Or am I a dead man walking?
The mask is good, just make sure it's the right kind of mask for the work you're doing. The same goes for a respirator. And find a comfortable one. If you don't like wearing it, you won't, and you'll die.