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Originally Posted by Tongue Pirate
We have a few welders at work, including an aluminum pool gun which seems to work really well. I need to go in work clothes some day so i can get in & get dirty.
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Dirty is the operative word. With aluminum, both TIG and MIG require clean metal. Especially MIG, since DC current doesn't clean as well as the AC of TIG. Use a solvent to remove any oils and a stainless wire brush immediately before you weld.