COMMON PROBLEMS and how to fix them

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Alligatoring is a form of paint failure where large cracks form in the surface layer only, resulting in the appearance of an alligator hide.

POSSIBLE CAUSES

• Applying paint over a porous, unsealed surface, resulting in rapid absorption and improper film formation.
• Applying paint in high heat or very low humidity, causing solvent to evaporate too rapidly.
• Applying second coat of paint before first coat has completely dried.
• Applying a harder, less flexible paint or coating over a softer or more flexible one (a brittle oil-based paint over a more flexible latex paint).

SOLUTION

Remove all loose paint, sand edges smooth, then prime and seal the surface with an appropriate primer for the specific application or surface to be painted. Once primer is completely dry, apply a fresh coat of paint.
 

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Flaking is when flakes form from the lifting of paint from the underlying surface. Flaking paint is normally preceded by cracking and can occur over different surfaces.

POSSIBLE CAUSES

• Cracking of exterior wood or plywood as it expands and contracts in response to changes in temperature and humidity, which is transmitted through the paint.
• Poor paint penetration, especially on nonporous wood with an excessive amount of hard or flat-grain pattern.
• Poor surface preparation.
• Applying the paint too thinly.

SOLUTION

Remove all loose flaking paint, sand edges smooth, then prime and seal the surface with an appropriate primer for the specific application or surface to be painted. Once primer is completely dry, apply a fresh coat of paint.

Follow label instructions regarding dry time of the paint. Acrylic latex paint generally has better early block resistance than vinyl latex or alkyd (oil-based) paints, although alkyd paints do develop better block resistance over time. The application of talcum powder, petroleum jelly or wax can relieve persistent blocking of the paint.
 

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