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Re: k5 66
When welding light gauge sheet metal, I used Argon/CO2 gas, solid .023 wire, low wire speed and low power setting. Also, try backing up your welds, where possible, with a piece of copper...it will act as a "heat-sink", as well as, provide a backing surface, to avoid blow-out and the weld will not stick to it.
I also use a flanging tool, whenever possible, because it backs up the weld and then you are doing a puddle weld, to secure the panel and then you can run full-penetration beads on both sides of the panel with the flange backing up the weld.
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