Before painting with water-based paint, bleached ceiling is primed. You should use a special means of deep penetration. After the primer dries, you need to test the old coating for strength. To do this, simply try to scratch the ceiling with a spatula. If the old coating is easily removed – it is better not to risk it and still remove it. If the chalk or lime soaked in the primer is held firmly, you can start painting.
Sometimes the owners of apartments and houses trim the whitewashed ceilings with a water-based emulsion without prior priming. This is also permissible. But only if a very high quality paint from a good manufacturer is used.
Basic rules whitewash
Of course, before starting such an operation as whitewashing the ceiling for the old whitewashing, the room needs to be prepared. (more…)