Poussierage

How It Looks

Description of problem

The sprayed paint dust particles land on the painted surface in the form of a powder.

Causes

  • Spray gun is too far from the painted surface.
  • Spray pass is too quick.
  • Unsuitable thinner.
  • Very high air pressure.
  • Incorrect application viscosity.
  • Wrong spray gun setting. Small nozzle with a large air cap.
  • Ambient air flow is disruptive.
  • Spray booth temperature is too high.

Preventive measures

  • Use proper application technique.
  • Use appropriate thinner.
  • Use correct air pressure.
  • Use correct application viscosity according to the manufacturer’s specification.
  • Use slower thinner or add a retarder if it is too hot.
  • Use correct spray gun setup.
  • Avoid turbulence.

Remedy

Ground coats:
Remove with thinner or wait until dry and sand topcoats sand with P1200 and polish.
In the case of metallic monocoat finishes (600 series) you should sand and respray.

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