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RAIN STAINS

This situation is an industry-wide issue. Latex paints tinted to dark colors, especially in the deeptone and deep rustic bases, where a great deal of colorant must be added, take longer to cure completely. If a heavy rain or dew occurs before an adequate cure time, white streaking can appear. In some cases, the streaking is the surfactants coming to the surface. Depending upon the degree of exudation, it may appear that the paint has washed away.

SOLUTION #1: Wash the area with warm water. Light scrubbing may be necessary. The white streaks will disappear and the coating will reappear intact..

Another condition, blistering, could also occur on insufficiently cured latex paint. What happens is water gets behind the paint film while it is still curing and blisters begin to pop up.

SOLUTION #2: Do not disturb the blisters. The blisters will recede as the water makes its way through the paint film to the surface.