Non-yellowing coating composition based on a hydroxy component and an anhydride component and utilization in a process of coating

A method of coating comprising the steps of:

• (I) coating a substrate with one or more applications of a pigmented basecoating composition to form a basecoat;
• and
• (II) coating said basecoat with one or more applications of a transparent topcoating composition to form a transparent topcoat;
• wherein at least one application of said basecoating composition and said topcoating composition is a non-yellowing coating composition comprising
• (A) a hydroxy component having at least two free hydroxyl groups per molecule;
• and
• (B) an anhydride component having at least two carboxylic acid anhydride groups per molecule derived from a mixture of monomers comprising greater than or equal to 11 percent by weight of an ethylenically unsaturated carboxylic acid anhydride the balance of said mixture comprised of at least one vinyl comonomer, the molar ratio of said vinyl comonomer to said carboxylic acid anhydride being at least 1.0:1.0 and sufficient to provide a color standard number of less than 150 according to ANSI/ASTM test method D 1209-69 when an amount of component (B) sufficient to provide 27 grams of solids of said component is mixed with 1.0 gram of dimethylcocoamine and reduced with butyl acetate to a solids content of 22.5 percent by weight;
• wherein the amounts of said hydroxy component and said anhydride component in said non-yellowing coating composition provide a ratio of equivalents of hydroxyl groups to equivalents of anhydride groups in a range of from 3:1 to 1:3.