The paint is faded. There are white stains, making the wall paint look uneven.

Causes 

• A new concrete wall that is finished in a short time will have the painted colour fade quickly. The area that is destroyed by alkali from the cement will have white spots, making the overall colour look uneven.
• There is high moisture on the cement wall or the wall is not dried up completely.
• The cement is not left to set at least 28 days before painting.

Solutions

• If the wall is just plastered, leave it to dry at least 28 days. (Moisture is not over 6% and pH is not higher than 8%).
• Scrub off and clean the old paint with water and a plastic brush.
• Apply Nippon Paint Ultra Block Sealer, which is high-resistant to moisture as a primer, 1 coat.
• Apply the outer coating 2 coats:
  • Interior: Nippon Paint AirCare
  • Exterior: Nippon Paint Weatherbond