Abstract: A coating composition prepared by adding 0 to 150 parts by weight, in terms of diorganosilane, of a hydrolyzate and/or a partial condensate of an diorganosilane (b), 2 to 300 parts by weight of a vinyl resin containing a silyl group (c), 0.01 to 50 parts by weight of a metal chelate compound (d), and an organic solvent (e), to 100 parts by weight in terms of organosilane of a hydrolyzate and/or a partial condensate of an organosilane (a), to which are added two or more mols of a type of .beta.-diketone and/or .beta.-ketoester (f) for one mol of the metal chelate compound (d).