PURPOSE: To obtain a paint giving a coat improved in adhesion to the edge portion of a steel plate, by using as a coat-forming resin component a specified resin, cellulose acetate butyrate resin and amino resin or isocyanate-contg. resin.

CONSTITUTION: A paint compsn. contg. as a coat-forming resin component at least one resin (A) among polyester, alkyd, acrylic and epoxy resins, cellulose acetate butyrate resin (B) and amino or isocyanate-contg. resin (C) in a wt. ratio of 100:5W20:15W40 in terms of heating residue. In the compsn., with less than 5pts.wt., based on 100pts.wt. resin (A), resin (B), edge coverage and corrosion resistance are reduced. With more than 20pts.wt., adhesion is reduced undesirably, while also undesirably, with less than 15pts.wt. rein (C), adhesion and corrosion resistance of the coat deteriorate, and with more than 40pts.wt., the coat is hard and brittle, and liable to cause delamination in a test of water- proof adhesion.