| abstract |
The present invention includes (1) a step of applying an aqueous first colored paint containing a hydroxyl group-containing polyester resin-containing film-forming resin having an acid value of 30 mgKOH / g or less and a pigment on an object to be coated; (2) Number average molecular weight of 1,000 to 10,000 obtained by polymerizing a monomer component containing 5 to 100% by mass of a film-forming resin and a polymerizable unsaturated monomer having an alkyl group having 4 to 24 carbon atoms A second aqueous coloring containing a copolymer obtained by copolymerizing a monomer component containing a macromonomer having a basic skeleton and a polymerizable unsaturated monomer having a hydrophilic group and a polymerizable unsaturated monomer having a hydrophilic group Painting the paint, (3) a step of applying a clear paint, and (4) a step of simultaneously curing the three coating films formed in steps (1) to (3), I will provide a. |