Patent No. U.S. 7,824,735 B2
PPG Industries has been granted a patent for a method for selectively coating a substrate comprised of applying an acid to a portion of the substrate, wherein the acid is comprised of R—C(O)—OH, where R represents a C1-C10 group, formic acid, carbonic acid, sulfonic acids, and/or phosphoric acids; coating the substrate with a coating comprised of a component that reacts with the acid; and removing the coating from the portion of the substrate to which the acid has been applied.