What should I do if the paint turns white and foggy after spraying the copper door?

The paint on the copper door turned into white mist after spraying, because the copper door was not acidified before painting, and the paint was oxidized with the surface of the copper door, which made the paint foggy and could not restore its original color.

Remedial measures: Depainting with dilute sulfuric acid, cleaning the surface of copper door and painting. Because paint removal also plays an acidification role in the door.

Attention: Pay attention to safety when removing paint with dilute acid, and wear masks, rubber gloves and protective clothing when working.