1. You can use the good old method and lay along the plinth of the newspaper.
2. Also, you can use “construction” tape. To do this, glue the surfaces adjacent to the plinth, and when the painting is completed, the tape breaks.
3. In the case when the walls are wallpaper, you can use improvised dense materials. For example, an extra piece of laminate or a spatula.
Whatever method you choose, you still need to be very careful, so we recommend that you seek the help of professionals who can do the job quickly, cleanly and efficiently.