This is a nasty dirty business if you do much of it. I have a 30x40 Quonset hut and after 8 years of plasma cutting with a water table plus clean up everything in the entire shop has a layer of black dust. Top of light fixtures and cabinets, inside closed drawers and cabinets. Everywhere.
I didn’t wear a mask for years then I started wearing the small blue Miller mask with 2 pleated filters and it can clog up in 2 days of plasma cutting so it is hard to draw air through it. The filters cost 12.00 a pair so that can add up pretty quick. I started putting a pre filter over the pleated one I cut from hospital masks (pre covid) to extend the life of the Miller filters. I can clog up the pre filter in one day.
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