Abstract: An aqueous coating composition for automotive exterior, the aqueous coating composition containing resin particles (A), a crosslinking agent (B), a pigment (C), and a nanocellulose (D). In the aqueous coating composition, a content of the nanocellulose (D) is 0.5 to 2.0 parts by mass in terms of solid content with respect to 100 parts by mass of a resin solid content in the coating, a solid content concentration of the coating composition is in a range from 45 to 65 mass %, and a viscosity of the coating composition measured by a Brookfield-type viscometer under measurement conditions of a temperature of 20° C. and a rotor rotation speed of 60 rpm is in a range from 350 to 1200 mPa·s.

Abstract: The present invention provides an aqueous coating composition which is capable of forming a coating film that has excellent cissing resistance and water resistance. An aqueous coating composition which contains (A) at least one hydroxyl group-containing resin that is selected from among (A1) hydroxyl group-containing acrylic resins and (A2) hydroxyl group-containing polyester resins, (B) an oligomer and (C) an alkyl etherified melamine resin, wherein: the oligomer (B) has a number average molecular weight within the range of from 200 to 800 and a solubility parameter within the range of from 10.0 to 13.5; and the molar ratio of methyl groups to butyl groups in the alkyl etherified melamine resin (C), namely (methyl group)/(butyl group) molar ratio is from 50/50 to 0/100.