LOSS OF GLOSS

Dieback, Matting, Hazing, Dulling

A dulling of the gloss as the film dries or cures.

CAUSE

• Topcoat applied in heavy, wet coats.
  
• Inadequate flash time between coats.
  
• Insufficient film thickness of topcoat color or clearcoat.
  
• Insufficient drying/curling of undercoats before applying topcoats.
  
• Using a poor grade and/or too fast evaporating thinner/reducer for spray conditions.
  
• Improper cleaning of the substrate.
  
• Insufficient air movement during and after application.
  
• Spraying over a deteriorated or solvent sensitive substrate finish without proper priming or sealing procedures.
  
• Natural weathering of the finish.

REPAIR

Allow finish to cure thoroughly, compound or polish to restore gloss.

Or, sand and refinish.

PREVENTION

• Apply the topcoat according to product label directions using the recommended gun set-up and air pressure.
  
• Allow all coatings sufficient flash between coats.
  
• Apply sufficient number of coats to achieve recommended proper film thickness. Check with film thickness gauge if possible.
  
• Allow undercoats to thoroughly dry/cure before topcoating.
  
• Select recommended thinner/reducer based on temperature, humidity, air movement, and size of repair.
  
• Clean substrate thoroughly before and after sanding.
• For maximum holdout, use a premium two component undercoat system.
  
• Properly wash and care for the finish on a regular basis.
  
• Using premium topcoat color or clearcoat system will provide maximum gloss and durability.

For air dry situations:

• allow exhaust fan to run 40 minutes or longer after spraying;
  
• open booth doors after finish is dust free; and
  
• maintain a shop temperature of 60 degrees fahrenheit or above, especially when drying overnight.

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