What ever you use make sure its up to the task! waiting on a CT scan now on my lungs as i have been getting some symptoms that need checking out. Be another week before I can get one. I have nearly always used a respirator but the dust settles all around the workshop and some times you stir it up when not wearing protection. Hopefully my problems will turn out to be relatively minor, but please take care as we deal in deadly stuff, wood dust and especially glass dust.