Method for forming multilayer coating film

A method for forming a multilayer coating film, the method comprising

• step (1):
• applying a titanium oxide pigment-containing first colored paint (V) to form a first colored coating film, in which the diffuse reflectance at a wavelength of 905 nm or diffuse reflectance at a wavelength of 1550 nm, or both, is 40% or more,
• step (2):
• applying a second colored paint (W) containing at least one pigment selected from the group consisting of (A1) a perylene black pigment, (A2) a black metal oxide complex pigment, and (A3) two or more pigments selected from the group consisting of blue pigments, red pigments, yellow pigments, and green pigments to the first colored coating film to form a second colored coating film,
• step (3):
• applying a third colored paint (X) containing a carbon black pigment to the second colored coating film to form a third colored coating film,
• step (4):
• applying a clear paint (Y) to the third colored coating film to form a clear coating film, and
• step (5):
• heating the first colored coating film formed in step (1), the second colored coating film formed in step (2), the third colored coating film formed in step (3), and the clear coating film formed in step (4) separately or simultaneously to cure these films,
• wherein the multilayer coating film has a lightness) L*(45°) of 3 or less,
• the multilayer coating film has a chroma C*(45°) of 1 or less, and
• the diffuse reflectance at a wavelength of 905 nm or the diffuse reflectance at a wavelength of 1550 nm of the multilayer coating film, or both, is 10% or more.