https://colornjoy.com/ The main rule is not to skimp on preparation. Each layer must be primed: the base before the filler, the filler before the wallpaper. This adds a day to the renovation but prevents peeling. Buy high-quality putty from reputable manufacturers. The price difference with cheaper alternatives is 50-100 rubles per bag, but the quality is incomparable. Good putty is flexible, does not shrink, and adheres well.