Metal adhesion promoter solves the problem of paint peeling on the surface of metal hardware materials. However, during the pre-treatment and surface treatment process of metal spray painting, it is necessary to strictly follow the specifications, clean the Dalian metal surface treatment, strengthen the control and management of the painting process, ensure good adhesion between the spray painting protective layer and the base metal, and prevent the coating protective layer from producing defects such as pinholes, bubbles, wrinkles, cracks, and peeling.