Today there are many wall decoration options. Some of them are staining. Before proceeding to it, the walls need to be prepared. If your apartment is in the houses of the old building, then the walls must be previously leveled. Although there are uneven walls in new buildings. So in any case, such a defect needs to be eliminated. The walls are aligned with a spatula and plaster. The latter is diluted according to the instructions for use and applied to a flat spatula, smeared on the wall. After that, the walls are slightly rumble and proceed to staining.