Patent ID: 7871669

Claim:
A method for coating a substrate to achieve a multiple color, two-tone finish, comprising: (a) applying a holdout capable chip resistant primer coating to an accent color area of the substrate; (b) applying a second, different primer surfacer coating to a non-accent area surface of the substrate; (c) applying an accent color basecoat coating wet-on-wet over the holdout capable chip resistant primer in the accent color area of the substrate; (d) curing the above composite coating of steps (a), (b) and (c) in a first bake; (e) covering the cured accent color area with a protective membrane; (f) applying a main color basecoat layer to the surface of the substrate; (g) removing said protective membrane from said cured accent color area; (h) applying a clear coat composition over said main color basecoat layer and said cured accent color area; and (i) curing the applied coatings from step (f) and (h) in a second bake, wherein the clearcoat composition used in (h) is a curable coating composition containing a film-forming binder and an organic liquid carrier; wherein the binder comprises: a curable film-forming material having a plurality of carbamate groups; one or more curing agents for the carbamate material comprising at least one monomeric alkylated melamine formaldehyde resin having from 0 to 1.2 moles of NH per triazine ring; a hydroxy functional silane polymer containing at least one hydrolyzable silane group and having a hydroxyl value of 60 to 150 mg KOH/g resin; and a second hydroxy functional silane polymer containing at least one hydrolyzable silane group and having a hydroxyl value of about 44 mg KOH/g resin or less.