Grinding of putty - dry or wet method?
There are several methods of grinding - dry and wet. Dry is done without using water with the help of special paper. If you use this method with water, the paper will fall apart. The second method is the use of pelts, which are designed to work with water. The abrasive layer of this material does not collapse under the influence of moisture. Use it for dry stripping is not recommended, as the skin is quickly clogged by particles of the surface being treated.
The advantage of the wet method is the absence of dust, which greatly complicates the work. The disadvantages are the following: putty is a material that absorbs moisture well, and therefore it will remain inside the layer and affect the metal elements, which can cause blooming in the future. It is also not possible to use a grinder for puttying to speed up the process. In addition, the whole result can be seen only after drying. The drawbacks of the dry method are only the formation of a large amount of dust, but all the other disadvantages that have a wet method are absent.
Important! Working in a dry way, it is necessary to protect the respiratory system and eyes.
Grouting tools
Dry mortar can be ground using a special mesh or sandpaper. The advantage of the grid is that it is not clogged with dust, as it is perforated. To replace it it is necessary in process of deterioration which is defined on an external condition of a grid. If it is torn or there is a feeling that the work is no longer so effective, it means it's time to change it. It is sold ready-made pieces for the size of the bar, so you just need to put it on and start working. The drawbacks are that the mesh is more expensive than sandpaper.
Sandpaper will be clogged with dust during operation, so it will have to be changed frequently. It is sold in various versions: large rolls, rectangular pieces, small rollers. After deciding to use sandpaper, you will need to be able to snap it to fix it to the bar so that the minimum waste remains. You can buy immediately ready bars with nazhdachkoy, but it will cost more. It is recommended to use sandpaper with grain from 60 to 100 for grinding. So, it is not necessary to take less than 60, as it will be a very rough nazhdachka, less than 100 is also not good, because it will be heavily clogged with dust.
Tip! For best results, it is necessary to grind twice, for the first time with a 60-grain sandpaper, and the second for 100.
grinding process Having understood how to grind the putty, it is necessary to start the process. To do this, consider how to wipe the putty. This process is very simple and it is much easier to perform than priming or plastering. All you need to do is take the bar and fasten it with special clamps to the mesh or sandpaper. Then, with a slight pressure, the grout begins. Movements are made in all directions. It is necessary to ensure that in already smooth places do not repeat the grout. Check the smoothness of the wall, running it over the palm of your hand, if you feel that everything is in order, move on.
It happens that in the process a small hole is formed. Do not rub the surface around it to smooth it. Leave it alone, and then finish with a primer. Check the smoothness and evenness of the wall can be a building level. After completing the grinding, it should show the same value at any place on the surface. If there are irregularities, then wipe them again.
Tip! Begin shpaklevku from below upwards in small strips, it will allow to make work more qualitatively.