Cracking

Cracking: Irregular cracks with varying depth appear on the paint surface. Cracking often occurs in repair areas or along edges.

Description:

Cause:

1. Existing cracks in the old paint surface were not completely sanded off before the new topcoat was applied.
2. Aging or excessive heat treatment leads to differences in properties between the old and new paint, making the topcoat more prone to lifting.
3. The paint was not completely dry before the clearcoat was applied, leaving it “active” beneath the surface.
4. Inappropriate substrate treatment:
   • The substrate is not clean enough.
   • Improper sealing.
5. Painting over an incompletely cured paint film or thermoplastic acrylic coating.
6. Cracks in the filler or primer.
7. Excessive paint thickness: The thicker the paint layer (especially air-dried), the lower its cold resistance, increasing the risk of cracking.
8. Before painting: Insufficient mixing, too little thinner, or the wrong type of thinner.
9. The substrate is too cold or too hot during spraying.

Repair:

1. Remove the old paint surface and reapply the paint system.

Recommended products to prevent and correct possible issues:

• Abrasives and accessories
• Paint spray guns

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