PPG Aerospace
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Paint Defects

Clouding

Description

Colour variation in metallic paint, with patches of lighter or darker tint, often in streaks following the direction of spraying.
 

Cause

Irregular application density of the basecoat. This is a result of:
  1. Poor spraying technique.
  2. Poor pattern from the spray nozzle.
  3. Paint too wet, insufficiently mixed paint, poor quality or wrong type of thinner.
  4. Surface too hot or too cold.

Prevention

1. Use the correct spraying technique
2. Adjust the nozzle to the correct pattern before commencing spraying
3. Ensure that the paint is thoroughly mixed to the correct consistency

Use only the recommended thinner. Ensure that the surface is within the recommended temperature range.

Rectification

If the clearcoat has not been applied, shade the base, otherwise run down the surface and repaint.