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Paint Defects
一、ALLIGATORING）
1．Description：
Very large checking or cracking which resembles the skin of an alligator or crocodile. Cracks may penetrate through to the undercoat down to the substrate.
2．Probable Causes:
Internal stresses in the coating where the surface shrinks faster than the body of the paint film. Can be caused by excessive film thickness and limited paint flexibility. Also found on paint films having a soft undercoat with a hard topcoat.
3．Prevention:
Use correct coating specification and materials. Avoid excessive thickness. Avoid application at high ambient temperatures.
4．Repair:
Repair will depend upon size and extent of alligatoring. Abrade or remove all affected coats and apply suitable undercoat and topcoat. Follow recommended application procedures.
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