A highly scratch-resistant multicoat paint system on a primed or unprimed substrate, comprising above one another in this order. The prealigner includes a processor that receives and records the peripheral position of the substrate relative to the angular position of the substrate. The bottle has a handle located on a side of the bottle and a sleeve that covers the handle. Alternatively, plasma treatment is performed on the surface of the interlayer insulating film on the TFT for surface modification.