Use textured paper (also known as color separation paper) as spacing. I suggest you use a better one with less viscosity. If you choose a more viscous one, it will be easy to tear off the original paint when you tear it off. Similarly, the adhesive is easy to stick to the wall and cannot be torn off. In this way, it is easy to repair the color when repairing, so that the white paint is nothing, and the colored paint will not work.