The invention relates to an apparatus, systems and methods involving a cold spray coating. A cold spray coating system (100) comprising, a cold spray coating gun (102) having a nozzle member (214) operative to emit a stream of gas and granules of a coating material from a nozzle opening (218) defined by the nozzle member (214) such that the granules of the coating material impact and bond with a first region of a substrate (406), and a heat source member (202) operative heat the first region of the substrate (406).