• Manifestations
  1. It is a white substance that looks like salt and appears on a painted surface.
  2. Any color of paint is susceptible. It is, however, not as apparent on white paint or the lightest tinted colors.
  3. When it appears on masonry, it is often perceived as efflorescence.
• Causes
  1. Raindrops, dew or other moisture, which impacts the painted surface.
  2. Using paints of a dark color and formulated with a calcium carbonate extender.
  3. Applying paint that is a dark color over a coat of primer or paint containing calcium carbonate.
• Solutions
  1. This stubborn problem is not easy to wash off. Even after being successfully removed, it can become a recurrent condition.
  2. It may bleed through any additional layer of paint. Sometimes it can even interfere with adhesion.
  3. The optimal way to remove frosting is by using a wire brush on masonry or sandpaper on wooden surfaces.
  4. Rinse thoroughly.
  5. Coat with an alkyd-based primer.
  6. Allow to dry for recommended length of time.
  7. Apply premium quality exterior paint.