A coating composition containing a reactive film forming binder and an organic liquid carrier: wherein the binder contains(a) an anhydride acrylic polymer having at least two reactive anhydride groups and contains polymerized monomers of an ethylenically unsaturated anhydride or an ethylenically unsaturated dicarboxylic acid and polymerized monomers of alkyl methacrylate, alkyl acrylate, styrene and any mixtures thereof, wherein the alkyl groups have 1-12 carbon atoms and the polymer has a weight average molecular weight of about 2,000-50,000;(b) a polymeric glycidyl component having at least two reactive glycidyl groups;(c) a hydroxyl containing polymeric component of a polyester polyol or a polyester urethane having a weight average molecular weight of about 500-2,500; andthe composition contains about 0.5-5% by weight, based on the weight of the binder, of a catalyst; wherein components (a), (b) and (c) are three separate components.