Mineral liquid primer for the base can be replaced by a universal, which you will complete the preparation of the walls. To those places of the walls that have deviations to the side, you need to apply as many thin layers of putty as it will be required to completely align. The uneven wall will complicate the work with the wallpaper. Especially such deviations are present in the corners of the room and the upper part of the wall. Each layer of dried putty must be treated with a skin.
