Actually he more than likely created a safer situation for welding by displacing the oxygen within the tank making it safe for welding. A tank that hasn't had fuel in it for years will still be able to give you that "Oh ****" moment by that sudden whoofff when you spark her off with fumes and O2 in the correct supply. Science, ain't she great!
Exactly, the co2 displaces the gas fumes. Yes I had poured old gas from it. As my bud would have said, "Us Southerns might talk slow but we ain't necessarily stupid"!! ha For sure.
