It so happened that you were flooded with your neighbors from above. Therefore, you need to make a cosmetic overhaul in Zelenograd throughout the surface. Where to begin? First, we cover all the furniture, plumbing, doors and other objects with plastic film to protect against dust and possible pollution. Firstly, we clean the old plaster (we take the roller and moisturize the upper layer of whitewashing and leave for a while so that the ceiling is well saturated). After using a metal scrap, clean the lime, wash off the remains of small particles. Secondly, we wait until the ceiling dries finally and process the entire surface with a primer solution. This is necessary to prepare for the final decoration, for example, for painting acrylic paint. Before applying a primer, you need to check the ceiling for cracks, small cracks or bumps. If this is the case thanks to acrylic putty, cover them, while using a rubber spatula.
Thirdly, having waited for the primer dried up, you need to make the surface smooth with grinding. To do this, use a special “skin”. After that, we apply one layer of primer again, and mask the existing yellow stains using matte paint. And we are waiting until it dries completely. Fourthly, the final moment, we use acrylic paint. We apply it in several layers (we use what is more convenient for you. It can be a wide brush or roller). That’s all. We are waiting for complete drying and ceiling, like a brand new.