This invention relates to a method for forming a multi-layer coating on a vehicle body, comprised of applying primer coating, base coating, and clear coat layers in a wet-on-wet-on-wet manner, and simultaneously curing the applied three layers together in a single baking step. The method comprises: employing ion-implantation to create a compensated region around the semiconductor device, followed by wet chemical etching to form a mesa on the order of 0. The stationary unit has a liquid tank for storing a liquid to be fed to the liquid ejecting head. A molten resin as a pipe raw material flows through the flow path.