Alligatoring
Patterned cracking in the paint film, resembling the scales of an alligator. These cracks generally do not expose the substrate (e.g. the surface that has been painted).
POSSIBLE CAUSE
- Natural aging of oil-based paints due to temperature fluctuation. The constant expansion and contraction results in a loss of paint film elasticity.
- Application of an extremely hard, rigid coating, like an oil enamel, over a softer, more flexible coating.
- Application of a topcoat before the primer or basecoat is dry.
- Application of a coating over a glossy finish.
SOLUTION
- Remove old paint by scraping, sanding, chemical removers, or a heat gun. Follow all manufacturers' cautions when using chemical removers or heat guns.
- Remove all surface contamination by washing with appropriate cleaner; rinse thoroughly and allow to dry.
- Glossy surfaces should be sanded dull. Follow label and data page directions for the appropriate drying time for any product.
PRODUCTS RECOMMENDED
- Clean with Krud Kutter Original, Mean Green, or Jomax product
- Zinsser Peel Stop Triple Thick