Primary treatment is the key.
Before painting, be sure to clean up the dust and scum on the wall. Brush the wall with interface thinner, and then fill the unevenness with bottom gypsum. In order to prevent cracking, some parts need to be pasted with kraft paper or special wall covering. Finally, scrape the putty twice to ensure that the wall is flat.
Attention to detail, smooth edges and corners.
Protect the edges and corners, and clean them after polishing. The putty should be scraped twice, and the direction is perpendicular to the previous one. After the coarse sandpaper is polished, it is polished with fine sandpaper until smooth.
Paint mixing and construction
Construction should be carried out on dry, clean and solid ground. Before painting the intermediate coating, if unevenness is found, fill it with putty. Paint should be mixed evenly before use.