The gloss of high-gloss metal trims can be demonstrated by neat brushstrokes and strong contrast between light and shade. The highlights can be left unpainted, and at the same time aggravation of the dark part of the treatment to increase its contrast between light and dark. The plain shoe buckle style is the basic training for the shape. The shape of the plain shoe buckle is very simple, without any extra accessories and decorations, the outline of the performance of the line is the biggest test for beginners. Compared with the requirements for lines in the overall style, the buckle lines must be more certain and clear. All line density should be deepened, and the width of the line should be strictly controlled. Fine and strong is the best.