Or better yet, use a respirator behind the mask. I miss the fume extractors that they had at the local college when I took my welding classes. It was one less thing to worry about when learning how to lay a proper bead.
Better yet PAPR with organic vapor filter. Expensive until you compare it to medical bills down the line. All kinds of stuff gives of fumes when heated like that. Rust convertor can give off phosphine. But yes at a minimum a P100 disposable respirator made for welding use.
Really should wear one for anything that generates particles, brakes, wire brushing, whatever. I wear a 3M 7500 with organic vapor cartridges just using plain old brake cleaner without the mustard gas. They are good masks. I use 7093 hard shell filters for sanding or anything they are very durable. They use them in hospitals for covid too. Regular P100 mask material is the same as the particulate layer in mil CBRN masks. Works electrostatically. You need a different layer for vapors though, the painting type.
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