Saying the coating lasts a year may imply that within a year the coating sustains enough damage to render it less effective. For instance 99% of the coating ma

Saying the coating lasts a year may imply that within a year the coating sustains enough damage to render it less effective. For instance 99% of the coating may be intact while a small portion has fragmented off due to imperfections in the formation of the initial layer. Additionally many surfaces, especially countertops, are themselves damaged at the micron scale in regular use. If a layer of the initial surface fragments off it will leave an uncoated surface behind. There additionally may be other mechanisms by which the coating is rendered less effective within a year, but I highly doubt a significant portion of the coating detaches from the surface within a year.