At the very beginning, you need to wash off all the old whitewash from the ceiling with warm water. After that, using a wooden block, you should try to smooth the surface of the ceiling plaster and «cut» with a spatula all the cracks that are observed there.
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Putty, in order to repair cracks, you can prepare yourself. To do this, you need one part of gypsum, two parts of chalk and exactly the same amount of carpentry glue. Dilute the resulting composition in a ratio of 30-50 grams of this mixture per 1 liter of water. The resulting mixture must be mixed thoroughly before a doughy mass is formed..
After that, you should hook the resulting mixture with the end of the spatula and smoothly apply it to the crack in the ceiling at the beginning across, and then along. The crack must be completely filled with the composition.
Next, the ceiling should be coated with a liquid primer. For such purposes, it is recommended to use a soap-making primer, which can also be prepared by yourself: 200 grams of laundry soap must be dissolved in 2 liters of boiling water, add 50-100 grams of 55% drying oil, 3 kg of slaked lime and stir until a thick homogeneous mass is obtained. Then this mixture must be diluted with 12 liters of warm water to obtain a mixture that resembles a jelly. The mixture should be filtered through a sieve so that there are no lumps..
