A method for applying a polymer to a substrate having a first surface and a second surface (such as an inside surface and outside surface). One or more apertures are provided through the substrate, with the apertures linking the first and second surfaces. A polymer coating is applied to the first and second surfaces, with some of the polymer coating flowing into and remaining within the aperture(s). The polymer coating within the aperture(s) serves to link the polymer coating covering the first surface and the polymer coating covering the second surface. The invention also encompasses coated objects made using the inventive method.