alligatoring

In painting and coatings, "alligatoring" refers to a paint defect where the surface develops a pattern of cracks that resemble the scales of an alligator's skin. This typically occurs when:

• A topcoat of paint is applied over an undercoat that hasn't fully dried or cured.
• There's poor adhesion between paint layers.
• The paint used is too brittle or incompatible with the underlying surface.
• Environmental conditions (like extreme temperature changes) cause the paint to expand and contract excessively.

Common causes in Australia might include applying oil-based paints over latex without proper surface preparation, or painting in hot, dry conditions that cause the paint to dry too quickly.

Prevention and remedy:

• Ensure proper surface preparation and compatibility between paint layers.
• Allow adequate drying and curing time between coats.
• Remove alligatored paint by scraping or sanding, then prime and repaint with suitable products.

Alligatoring is both a cosmetic and functional issue, as it can lead to further paint failure if not addressed.