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Runs or sags
Definition
Paint runs on vertical body parts.
 
Cause
Uneven paint application.
Spray viscosity was incorrect.
Unsuitable reducers were used.
Air, material or ambient temperature was too low.
Film thicknesses were too high.
Defective spray gun (nozzle).
Intermediate flash-off time was too short.
 
Prevention
Warm object, paint and ambient temperature up to 20 °C / 68 °F.
Ensure that the spray gun is in good working order. Follow application recommendations in Technical Data Sheets.
 
Remedy
After the specified drying time, sand down and polish. If, after sanding, it is clear that the paint has not dried through, allow to dry for longer, clean thoroughly with silicone remover and respray.
With smaller defects, polish the affected area after sanding.
 
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