Abstract: The present invention provides a process for painting a polyolefinic resin component comprising washing the surface of the polyolefinic resin component, directly coating at least one time the surface with the following paint, and forming topcoat on the surface, the paint being a mixture of a main component containing principally a polymer resin having a hydroxyl number of 20-150, which is obtained by polymerizing (A) Chlorinated polyolefin, (B) Acrylic monomer and (C) Polyester prepolymer and a curing agent of (D) polyfunctional isocyanate compound.

Abstract: An improvement in a process for coating a surface with a aqueous paint composition containing as the primary film-forming components: a synthetic polycarboxylic acid resin as the main binder component; an amino resin as a heat curing cross-linking agent for the polycarboxylic acid resin and a neutralizing agent for neutralizing the acid groups of the polycarboxylic acid resin, is provided. The improvement is applying the aqueous paint composition to the surface as two compositions (A) comprising a synthetic polycarboxylic acid resin having a neutralization degree of 30 to 70% and an amino resin; and (B) comprising a synthetic polycarboxylic acid resin having a neutralication degree 30 to 80% higher than that of the polycarboxylic acid resin of (A) and an amino resin, or (C) a neutralizing agent comprising ammonia or an organic amine.