you better be fast walking the cup if you're welding hot, or the pipe is going to be black instead of gold.
i wouldn't thing you could walk the cup on SS due to its need for longer gas coverage wile it cools. its definitely not some thing i would expect to be learned in a week's time if it could be done. i'm fairly new to TIG but have gotten better results with higher gas flows with SS. walking the cup seems like it would reduce the time coverd by gas ?? never tried it and i'm shore some one with years experience could do it or explain how it gets enough gas coverage ?