I have been using 1/16 tungsten and filler, but it just doesn't seem quite right. I think the rods too big, tried some twisted up MIG wire (all we have is .030 wire) which was better.
I would like to try the .040 and .030 tungsten and filler, seems like it would be easier to control the heat. I have been practicing on pieces of sheet metal (16 & 20) and, while this sounds "cocky" it's not, it went very well and almost seemed easy. Didn't burn through, decent pattern, worked the way I hoped it would.
Fast forward to trying it on the car. A '78 Trans Am I'm restoring for a customer. Tried it on a quarter skin and couldn't lay a bead to save my life. Grabbed the mig and decided I would practice on my own project until I got better. Unfortunately, it will be a while before I have time to do more "real" practice on my pickup. I'm very good with MIGing on sheet metal, but I still get those little "dents" from warping. Was doing short tacks and tapping in between, letting it cool... just hoping the TIG will help out a big.
I'm trying to explain what I am trying to learn a little better, but the pain meds I'm on from my surgery are making it difficult. I'd appreciate everyones techniques and specs on their sheet metal welding. Tungsten, filler, and gas cup size, amperage ratings, and pulse settings (if you have them).
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