check you tube as there may be some vidioes there. main thing is to have the panel well fitted and tack before you weld..guys get in a rush and overheat the panel and warp it making for huge problems. also set your heat and wire speed on a test piece to get that right before welding on the car. and practice as even some really good welders have issues with this sheet metal..
I have tried most all of it and now do what is known to work..