A method of manufacturing a bright surface product as an automotive part having stress resistance against collisional external force, the method comprising: a first step of performing electroless plating in an electroless plating bath to form a metal film comprising nickel or a nickel alloy, palladium or a palladium alloy, tin or a tin alloy, copper or a copper alloy, silver or a silver alloy, gold or a gold alloy, or cobalt or a cobalt alloy on a substrate comprising resins, metals, ceramics, paper or glass or a base coat layer deposited on the substrate; a second step of allowing the discontinuous segmentalisation of the metal film with cracks either: during a heat treatment at 80°C or more thereby utilizing the difference in internal stress between the substrate and the metal film; or after its removal from the electroless plating bath thereby using the internal stress remaining in the metal film once the substrate and the metal film are removed from the electroless plating bath and cooled to room temperature; to form an island-like metal film comprising a collection of fine metal regions with island-like structures and having an appearance of an integrated bright surface, wherein the width of the cracks is 10 nm to 2 pm; and characterized in that the method further comprises a third step of forming a translucent top coat layer comprising silicone acrylic resin, acryl urethane resin or urethane resin to cover the fine metal regions of the island-like metal film and enter into the cracks to make contact with the substrate or the base coat layer. a first step of performing electroless plating in an electroless plating bath to form a metal film comprising nickel or a nickel alloy, palladium or a palladium alloy, tin or a tin alloy, copper or a copper alloy, silver or a silver alloy, gold or a gold alloy, or cobalt or a cobalt alloy on a substrate comprising resins, metals, ceramics, paper or glass or a base coat layer deposited on the substrate; a second step of allowing the discontinuous segmentalisation of the metal film with cracks either: during a heat treatment at 80°C or more thereby utilizing the difference in internal stress between the substrate and the metal film; or after its removal from the electroless plating bath thereby using the internal stress remaining in the metal film once the substrate and the metal film are removed from the electroless plating bath and cooled to room temperature; to form an island-like metal film comprising a collection of fine metal regions with island-like structures and having an appearance of an integrated bright surface, wherein the width of the cracks is 10 nm to 2 pm; and characterized in that the method further comprises a third step of forming a translucent top coat layer comprising silicone acrylic resin, acryl urethane resin or urethane resin to cover the fine metal regions of the island-like metal film and enter into the cracks to make contact with the substrate or the base coat layer. during a heat treatment at 80°C or more thereby utilizing the difference in internal stress between the substrate and the metal film; or after its removal from the electroless plating bath thereby using the internal stress remaining in the metal film once the substrate and the metal film are removed from the electroless plating bath and cooled to room temperature; to form an island-like metal film comprising a collection of fine metal regions with island-like structures and having an appearance of an integrated bright surface, wherein the width of the cracks is 10 nm to 2 pm; and characterized in that the method further comprises a third step of forming a translucent top coat layer comprising silicone acrylic resin, acryl urethane resin or urethane resin to cover the fine metal regions of the island-like metal film and enter into the cracks to make contact with the substrate or the base coat layer.