Question about welding repair parts on first gen

[im4u2nvss]

I am about ready to start doing sheet metal repairs on my 67 Firebird(complete floor, one side rocker repair, exc). It looks like the insides of my factory rockers, along with some other parts are galvanized. My question is, how have some of you prepped these galvanized areas for welding(butt, spot)? I am trying to avoid the "fume fever" if at all possible, and want to know the best method. I asked a friend who restored a 67 years ago and he said "Dont worry, alot of people restore 1st gens and are still alive to talk about it(including himself)". I did buy a miller Respirator https://www.millerwelds.com/safety/r...tors-half-mask , I am unsure if this is overkill. I have done my fair share of welding over the years, but never old car sheet metal. And as I age, I "care" more about safety/protection, as I want to enjoy watching my kids grow up. Any advise would be more then appreciated.