Poor primer control caused the paint to fall off the painted door. Because there is no professional equipment, it is not handled properly when pasting the panel, which leads to the paint falling off in the later period of the paint spraying door. In some factories, there is no vacuum spray booth, and floating dust appears during baking, which leads to the paint falling from the painted door. The dust scraped on the door panel is too thick.

Painting the door may be because the surface is too smooth. If the original paint is shiny or powdery (with untreated paste paint), the new paint will not stick to the surface firmly, or it may be that the wood is rotten or the metal is rusty, or the paint is of poor quality and peeled off.

Extended data:

Maintenance of painted doors When using painted doors, be sure to avoid wiping the surface of the door panel with a wet rag, because the integrity of the paint film may be destroyed and the paint film will crack, especially in an excessively wet environment.