We used the plasma system to remove the spot welds along the rockers and a grinder to remove them along the tops of the rear framerails. It takes a lot of practice with plasma to successfully use this cutting method. It’s recommended to practice on the old floorpan and get comfortable with the Gouge setting before trying it on the car. Sometimes, it’s easy to forget or not see exactly where the spot welds are, so first find them and mark them with a black marker. Be cautious and watch closely as the metal is removed. We held the plasma torch at a sharp angle to the surface to remove only the top layer of metal over the spot welds.