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Respiratory Protection For Welding Galvanized Steel. Here is a highly-rated half-mask respirator that you can use. Filtering out the metal fumes associated with it.
Not all respirators are flame and spark resistant. Start by getting a high-quality welding mask a heavy-duty respirator and a pair of welding. Gas or oxy-fuel welding uses a flame from burning a gas usually acetylene to melt metal at a joint to be welded and is a common method for welding iron steel cast iron and copper.
A sanding or drywall mask is not sufficient.
Here is a highly-rated half-mask respirator that you can use. Get a welding mask respirator welding gloves and apron. The best way to protect yourself against metal fumes is to use local exhaust ventilation at the source of the smoke. It is an entire face neck and upper body cover and it can either be attached to an air source or have its own filter.