The miracles of science™
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Description
A series of deep cracks resembling mud cracks in a dry pond. Often in the form of three-legged stars and in no definite pattern, they are usually in the color coat and sometimes the undercoat as well.

 

 

Origin and Potential Causes:
  • Excessive film thickness. Excessively thick topcoats magnify normal stresses and strains which can result in cracking even under normal conditions.
  • Materials not uniformly mixed.
  • Insufficient flash times between coats.
  • Incorrect use of additives.
  • Substrate is too hot or cold.
  • Use of coats incompatible with each other.
  • Omitting the activator when mixing a 2K product.

 

Prevention Techniques:
  • Don't pile on topcoats. Allow sufficient flash and drying time between coats.
  • Do not dry by fanning with compressed air from the spray gun.
  • Stir all pigmented undercoats and topcoats thoroughly.
  • Read and carefully follow recommendations in the Technical Data Sheet(s). Additives not specifically designed for a color coat may weaken the final paint film and make it more sensitive to cracking.

 

Remedy
The affected areas must be sanded to a smooth finish, or in extreme cases removed down to the bare metal, and a full refinish system reapplied.

 

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