Preparation of the base
Before starting the color, the surface should be examined. It should be clean, dry and even. If plaster or paint is applied to the surface, then you need to make sure that the old coating is reliable (otherwise new paint can lag behind with the old coating). This can be done by tapping, thus, weaknesses in the coating are determined. To check the reliability of the old paint, you need to take the tape, glue it, it to the surface and abruptly tear it off.
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