Humans have been welding at least since the advent of the first horseshoes and wagon wheels. Back then, the village blacksmith didn't have screw threads or Cherry rivets, electricity or gas. For those ...

The amount of exposure to individuals can depend upon work practices, ventilation, and location. Will the work be done in wide open areas, inside a building adjacent to other work processes and people ...

Broken, rusty parts are common fare for classic trucks. Rust penetrates the pores of older metal, and even with glass-beading and acid dips, rust remains chemically embedded in badly oxidized metal.