A tannin-blocking coating is provided. The coating includes a binder resin and casein proteins. The tannin-blocking coating mitigates migration of tannins from a substrate on which the tannin-blocking coating is placed.

The present disclosure relates to a method of forming a composite article. The method includes: providing a structural component with a surface, wherein the surface includes a silicone elastomer, a fluoropolymer, or a copolymer or a block copolymer; optionally pre-treating the surface with a plasma treatment; coating the surface of the structural component with a precursor coating component, wherein the precursor coating component including a polyvinyl alcohol based component, and treating the precursor coating component to form a crosslinked coating layer overlying the surface of the structural component.