Plastering of walls and their further putty -this is the leveling procedure for subsequent decorative finishing. And the first is considered a rough process, and the second is more subtle. The process of puttying is also called polishing the walls. 
Correct grinding of corners. When applying even a very thin layer of polishing material on the wall, there can not but remain tubercles, uneven places. This is due to the use of a spatula with sharp ends during the disperse of the putty and the connection of one shaded part of the wall with others. To reduce the leveling area, professionals are advised to use a wide spatula. But even in this case the joints will still be visible and need to be polished. After puttying, the wall should dry for a day, only then it can be grinded. It is important to remember that you can not ground the wall after the puttying procedure. Sanding walls should be carried out immediately after the process of puttying without intermediate stages of work.
Than to polish walls?
Scheme of correct grinding. Sanding the walls can be a special grinding machine, but you can do it manually. The second method is considered by professionals to be more preferable and qualitative because of the possibility to remove roughness in places difficult for access. The use of the machine polishing method is advisable only with a large trimmed area, but in this case there are still minor flaws, which then have to be smoked by hand. The advantages of machine grinding are the high speed of workflow and convenience. The downside is that the price of such a machine is quite high, therefore, in order to carry out repairs in only one apartment, there is no point in buying it. For a manual method of grouting putty, you must have a grinding net or a fabric-based abrasive on hand. To save money, it is better to buy a roll emery, because its consumption when polishing putty is very high. To fix the abrasive and the convenience of work, you also need to buy a bar. 
Grinding is performed in a circular motion. When buying sandpaper it is necessary to look at the marking, because the degree of granularity of the abrasive plays an important role in the work of grinding the walls. On the foreign emery there will be a "p" icon and numbers 24-600. The grains are larger than the number smaller. When grinding putty is most often used abrasive with the notation "r-100", "p-60" and "p-80". As for the domestic production of emery, it is marked with the letter "n" and numbers from 4 to 80. The designation of the finest sandpaper is different from the conventional marking. By nulevka means abrasive "m-40". When marking the domestic emery with a decrease in the digital value, the degree of abrasion decreases. This distinguishes the paper produced in Russia from imported material. Emery has a significant drawback. The base has the property to wear off and quickly wear out, clogged with dust. The material has to be changed frequently, so it's better if not grinding is used, but a grinding net. This material is worth more than nazhdachki, but its consumption is much less. The grid is marked as an emery of imported production. Back to contents</a>
Wall polishing: the work process
The walls can be polished only after a fulldrying putty. Before you start, you need to hang the door openings with a damp cloth, so that dust does not get into other rooms. The process of grinding is quite dusty, so it's worth thinking about your own suit, the fabric of which should be dense. Also, wear a respirator, gloves and eye protection glasses. You can start grinding the walls after the last applied layer of the putty has completely dried. We fix the nesting on the grout for grouting, take the angle beyond the start line and start work. Mop it with light circular motions, not pressing on the bar. Twice in one place it is better not to pass to avoid altitude swings. To check the quality of polishing, carry out a little on the treated area with your hand. It is better to send to this site a powerful beam of light from a flashlight or a searchlight under the slope of an acute angle. Sites with identified defects should be brought to the mind with a smaller abrasive. It is necessary to take into account the paint that will be coated after the treatment. Matte will help to hide some roughness, but glossy will require better polishing. If the putty walls are relatively high quality, and for finishing the room, for example, vinyl wallpaper, then grinding can not be carried out. With preparatory putty works of high quality, there is no need to grind the walls completely. In this case, you can resort only to local work. After puttying, if it is not planned to glue the wallpaper, the walls are painted with a control layer. In the paint, which will then be applied to the wall, add water and apply to the wall, as a result of which all the irregularities are visible. Defects shpaklyuyut again, allow to dry and again polish with an abrasive. Having finished grinding, the surfaces are cleaned of dust by a vacuum cleaner. The next step is the priming of the walls, then the wallpaper is glued or the paint is applied.
