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.