When spraying metal coating on non-metallic surfaces such as plastic, glass, wood, gypsum, cloth, etc., apply a layer of adhesive with good adhesion on the surface to improve the adhesion of metal coating. For example, brushing a layer of organic paint or adhesive similar to the polymer plastic coating on the surface of the metal substrate can reduce the harsh requirements for the preheating temperature of the substrate during thermal spraying, and improve the spraying efficiency and the bonding strength of the coating. Coating and primer method
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