Description

Areas of granular paint particles adhering to, or partially absorbed in the surface of the film.

Cause

Spray dust deposited on the surface. This results from:

  1. Poor masking.
  2. Paint from a subsequent application settling on the surface.
  3. Compressed air pressure too high.
  4. Inadequate extraction or ventilation.

 

Prevention

  1. Mask carefully and completely, ensure that the edges of masking tape are thoroughly sealed.
  2. Protect adjacent surfaces from spray dust.
  3. Set compressed air pressure as low as possible, consistent with proper atomisation.
  4. Use a spray booth, and ensure correct air circulation and extraction.

 

Rectification

Rub down with abrasive compound and polish.

 

 

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