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You can only become experienced by trying. On you tube there are lessons on how to use a tig. I only got mine last year, and you get the hang of it quiet quickly. I use argon for tig, and I used shielded for mig. If you can change the power settings, then shielded wire is fine, but a bit messy, as it leaves a thin coating of slag, which is easy to wire brush of. Otherwise you can use co2 for mig as well as argon. I got sick of paying for bottle rent, as I don't weld a lot, so I bought disposable bottles.
I find tig is a lot like oxy welding, but with a controlled flame. Great for stainless.
JD
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