From the ceiling

The remaining whitewash from the ceiling will need to be washed away several times so that it does not work out to smear lime.

After the ceiling dries, it must be primed with the same mixture that will be used to align the ceiling. For the thoroughness of the primer in the corners, it is better to use a brush, and on the rest of the surface you can also work as a roller. And after the primer dries, the ceiling will be prepared directly for its leveling.