Wall putty – work is painstaking, but, if desired, you will cope. First, clean the walls of dust, peeling and remnants of the old finish. Grinkle the slots, deep cracks, holes from nails or screws with a sickle.
Then, be sure to treat all the surfaces to beathered with a primer. While the soil dries, prepare the putty, dissolving the dry mixture with water, following the instructions on the packaging. The starting putty is designed for preliminary leveling it can be applied with a thick layer, but not more than 5 millimeters at a time. The finished putty is applied with a layer of up to 1 millimeter, and allows you to get a flat and smooth surface, thanks to a smaller fraction. We begin the putty of the walls. Hook the solution with a narrow spatula, apply, along the entire length to a wide spatula. Starting from the left edge of the wall, pressing the spatula at an angle of 25-45 degrees relative to the surface, rub the putty from the bottom up and, preferably diagonally. For puttying corners, use an angular spatula.
Note that even a specialist will not receive a perfectly smooth surface the first time. Let the first layer dry, then polish with sandpaper P80-r120 with sandpaper and treat with a primer. Apply the next layer of putty, until the desired result is obtained. I hope he will please you.