Random breaks or crevices in the paint film, often adjacent to filled seams or panel edges. Cracks frequently take form of a three pointed star. The depth of penetration of the paint film varies, severe cracks may penetrate to the substrate.
Fine cracks of splits may occur at the featheredge of a spot repair shortly after the application of the topcoat.
Weakness such as blistering being exaggerated by weathering, or magnification of stresses normally present in the paint film. These stresses are increased by:
In minor cases, where only the topcoat is affected, sand down to a sound finish and repaint. If cracking has penetrated the primer, strip all paint from the affected area, ensure that any defects in the substrate are corrected and repaint, persist, rub down the surface and repaint.