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06

Drying

Haze / blush

Misty, milky paint surface - moisture from the air penetrates the fresh layer before it dries.

Haze / blushOKHazing

Cause

  • The thinner is too fast in relation to the temperature and conditions - the varnish dries too quickly, the surface cools down and attracts moisture from the air
  • Too high air pressure in the gun - accelerates evaporation and intensifies the cooling effect of the surface
  • Low ambient temperature combined with high humidity - classic conditions for condensation on fresh paint
  • A cold painted element in a warm cabin - the temperature difference causes moisture to condense on the surface
  • 2K varnish exposed to humid air too early - cross-linking not yet complete
  • Failure to respect the dew point - surface temperature too close to the dew point of the air in the cabin
  • Incorrect spray pressure on metallic and pearl basecoats - too high a pressure confuses the metal flakes and causes uneven light reflection resulting in a cloudy effect
  • Wrong base coat thinner - too fast and the metal flakes won't have time to become parallel to the surface before the layer dries
  • The distance between the gun and the painted surface is too large for metallic bases - the paint reaches the surface partially dry, the metal flakes are positioned incorrectly
  • Too thin layer of metallic base - insufficient amount of metal flakes causes uneven coverage and a hazy effect, especially visible in silver and champagne

Prevention

  • Select a diluent appropriate to the current temperature and humidity - in difficult conditions, use a slower-evaporating one
  • Reduce the air pressure during painting to that recommended in the technical data sheet
  • Painted elements must be at ambient temperature - acclimatization is mandatory before painting
  • Avoid painting when the relative humidity exceeds 80%
  • Check the dew point before starting work
  • Follow the recommended temperatures and drying times before leaving the item outdoors
  • Do not paint in a cold or humid environment without properly preparing the booth

Repair

Superficial opacity - clear varnish
  • Bake the element at 60°C for 20-30 minutes - the heat drives moisture out of the layer
  • After cooling, polish the surface with a fine paste
  • If the shine hasn't returned, sand the clear coat off and reapply
Turbidity in the base layer
  • Heat the element for 5-10 minutes at 60°C
  • Cool to ambient temperature
  • Apply one or two layers of base with a slowly evaporating thinner
  • Coat with clear according to the technical data sheet
Widespread or deep clouding
  • Heat the element for 20-30 minutes at 60°C
  • Sand off the entire top layer
  • Before reapplication, check the cabin conditions and select the appropriate thinner for the current temperature and humidity
  • Reapply the system observing the evaporation times