Now you can start painting work.

If the ceiling has cracks less than 0.2 mm, then you can paint directly on the surface without preliminary preparation. If the cracks are more than 0.2 mm, then you will have to open them and apply 2 layers of putty, after gluing the painting net. Then polish and clean these places from dust. If necessary, you can apply another layer of putty or primer. After the surface is dried, it is necessary to sanded with finish sandpaper and remove the dust. Now you can start painting work.