The present invention provides an adhesion promoting agent which includes a graft copolymer formed by a halogenated polyolefin polymer with at least one reactive functionality and a substantially saturated hydrocarbon polymer having more than one reactive functionality. Two side wall areas are located on axial side sections of the brake disc to be covered that are directly opposite each other, wherein the side wall areas cover at least a partial area of the axial sides of the brake disc. The coating has no significant detrimental effect on mid-Infrared reflectivity, so the IR motion sensors performance is otherwise unaffected. A docking station and portal provide easy access to the fish pen.