the mechanic may do list for the day

Every time I've cut up a car or truck with a plasma cutter it usually results in melted consumables in the torch head, or stuff burning inside panels like sound deadener or seam sealer, plasma cutters do better with clean metal.
My preferred method is an air chisel with a long reach panel cutter for the majority of the big panels and a sawzall for the the pillars and frame rails.