Solving Common Problems
Most common exterior painting problems are the consequence of poor preparation. Paint adheres to clean, dry surfaces.
For more information, see Prepping. Here's the run-down on common exterior paint problems and solutions.

Likely causes
Airborne algae spores grow on continually wet surfaces in bright light conditions appears as green, red or brown film and can be difficult to remove.

Sand, scrape or abrasive pad, bleach & water solution (1:3). Prime with either oil or latex primer depending on requirements.


Likely causes
Like peeling, alligatoring is an adhesion problem. If latex paint was applied when the surface temperature was too cold, the paint doesn't get a good chance to form a stable film.

Sand off and scrape all the loose paint. Spot prime bare areas. Paint with a high quality exterior paint and follow all label instructions.


Likely causes
Development of ridges and furrows in a paint film during drying, caused by applying a very thick coat of paint. The top surface of the film dries faster than material underneath creating a pulling/shrinking action.

Sand thoroughly after allowing ample dry time. Coating may require other removal methods such as chemical stripping to reach original surface quickly.

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