Welded pipe for 35 years. Lol Same applies to any welding. Stick Tig Mig If you use stick rod for the filler you have to knock the flux coating off first. A hammer works just fine. If you want to fill holes with TIG get some silicon bronze filler. It is like gas welding but with a TIG torch. Plus that rod can weld galvanized without all the white and spatter you get with mild steel and galvanized.
