use water to wipe the walls and make sure the walls are washed clean of lime dust or foreign matter then rub the wall with your hands or black cloth to make sure the walls are really clean
mix anti-effloracense paint until well blended together hardener and paint on problem walls. Let dry up to 6 hours or daily.
color the walls with appropriate color choices to use paint easy paint Royal Series or leave the walls alone using a silver anti effloracense color.