Frosting

Frosting

A white, salt-like substance on the paint surface.  Frosting can occur on any paint color, but it is less noticeable on white paint or lighter tints. On masonry, it can be mistaken for efflorescence (see Efflorescence and Mottling). Possible Causes:                  ...
Foaming / Cratering

Foaming / Cratering

Formation of bubbles (foaming) and resulting small, round concave depressions (cratering) when bubbles break in a paint film, during paint application and drying. Possible Causes: Shaking a partially filled can of paint. Use of low quality paint or very old acrylic...