Laser Welding
Laser welding is a new welding technique using (laser) light.
The biggest advantages of laser welding on thin sheet metal are that it generates less heat, resulting in minimal distortion compared to TIG and MIG welding. The weld is more attractive, and laser welding requires less clean up work. Correction of the sheet metal is therefore almost unnecessary.
That's why I use laser welding for as much welding as possible, especially when it involves sheet metal.