To improve weather resistance of a metallic coating film by applying a color coating material on the objective body, further applying a metallic coating material containing aluminum flakes having surface-colored with color pigments and coated with a resin containing a UV absorbent or photostabilizer, and applying a clear coating material.

A color coating material containing color pigments is directly applied on the objective body made of a metal or a plastic material for an automobile or the like, or applied after an under coating material or intermediate coating material is preliminarily applied and hardened on the body. After the color coating film is hardened or before hardened, a metallic coating material is applied on the surface of the color coating film. Then after hardening or without hardening the film, a clear coating material is applied on the metallic coating. Then the film is hardened by heating under specified heating conditions to form a multilayered coating film. The metallic coating material contains aluminum flakes the surfaces of which are colored with coloring pigments and coated with a resin containing a UV absorbent or photostabilizer.