Hello everyone, I'm new here. I have a MM135. I'm welding on 22 gauge galvanized (basically what is in a late model Ford floorpan). I am repairing some floorpan and body issues. I am using .024 wire and 75/25 gas, set at about 25. I have cleaned the metal pretty well, but am still getting tons of porosity and if I turn the heat up, it burns through. I have found my most success with the wire speed up a little higher than recommended. I am keeping about 1/2" in stickout, but know I should probably be keeping it closer. I am also using 3M weld thru coating to protect the metal faces that are captured inside an area after welding, from later rust. Does anyone know of any coatings or anything that will help with the porosity. I'm at a loss, and I want to do it right the first time. I have tried welding and grinding smooth over and over with no luck. Any suggestions would be great.
Doug
Doug
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