To do this, take about 10 liters of water (warm), rub 2 tablespoons of ordinary soap and throw into the water. Add 5 large tablespoons of soda to the resulting liquid. With the help of a roller moistened with this liquid, you can wash off all the whitewash from the ceiling. Wipe the surface with soapy water until the surface is completely clean.
Use all-purpose or special ceiling cleaners, diluted with warm water. The water temperature should not exceed 30-40°C!
Apply the solution with a spray bottle or soak a piece of flannel fabric with it.
The ceiling of a car can be cleaned with your own hands, a vacuum cleaner, a steam generator or a tornador. For light soiling use dry cleaning or gentle wet cleaning. The choice of detergents and technologies depends on the color and texture of the ceiling.
It is not recommended to wash the ceiling before painting - it is enough that the surface is treated with a primer, and water can wash away its beneficial properties. If the ceiling is already painted with a water-based emulsion, then before applying a new coat of paint during the repair, it can be washed with water, dried, covered with primer and a new finish applied.
On a matte ceiling, pollution is less visible, but they are a little more difficult to remove than from a smooth glossy surface.
Since the matte stretch ceiling will have to be washed in two stages, you need to prepare mild detergents (washing gel or dishwashing liquid) and ammonia.