1
Identify the defect
A run or sag appears as a wet trail or curtain of coating. Orange peel looks like a fine uneven texture similar to citrus skin.
Runs and Orange Peel
Runs and orange peel are different finish defects. Runs usually result from applying too much wet material, while orange peel is a textured surface caused by uneven flow and atomisation.
Quick answer
The most effective fix is usually controlled application: correct distance, steady passes, light coats, suitable flash-off and a properly prepared substrate.
What to do
2
Check surface preparation
Make sure the substrate is clean, dry, stable and correctly keyed. Contamination or excessive roughness can make the finish harder to control.
3
Use the correct spray distance
Follow the product guidance. Too close can overload the surface and cause runs; too far can leave dry, textured material.
4
Apply lighter coats
Do not chase full coverage in one pass. Build colour or opacity gradually with controlled coats.
5
Keep the aerosol moving
Start moving before spraying across the panel and maintain a steady speed. Avoid dwelling over edges or details.
6
Observe flash-off and recoat times
Give each coat the time specified by the product before applying the next. Heavy films can take much longer to dry.
7
Refine the surface only when cured enough
For a repair, allow the coating to reach the appropriate sanding condition before flattening a run or texture. Do not sand soft paint aggressively.
8
Adjust the system rather than overloading
If repeated coats become difficult to control, stop and reassess product choice, temperature, technique and application conditions.
Important
Follow the product label and current Technical and Safety Data Sheets. Do not modify, puncture or misuse aerosol containers.
Common mistakes to avoid
Trying to cover in one heavy coat
Review this point before continuing with your coating system.
Holding the aerosol too close
Review this point before continuing with your coating system.
Stopping over the surface while spraying
Review this point before continuing with your coating system.
Ignoring flash-off times
Review this point before continuing with your coating system.
Sanding paint before it is ready
Review this point before continuing with your coating system.
Spraying in unsuitable temperature or airflow conditions
Review this point before continuing with your coating system.
Frequently asked questions
What causes runs in spray paint?
Runs are usually caused by too much wet coating in one area, often from spraying too close, moving too slowly or applying excessive material.
What causes orange peel?
Orange peel can result from poor atomisation, incorrect spray distance, fast solvent loss, unsuitable conditions or an application that does not flow sufficiently.
Can I sand out a run?
Yes, once the coating has reached the correct sanding condition stated by the manufacturer. Refining it too early can make the defect worse.
Can orange peel be polished out?
Some finishes can be refined after full cure, but the correct process depends on the coating system and sheen. Check the product guidance first.
Should I spray heavier coats to avoid orange peel?
No. Heavy coats can increase the risk of runs and drying problems. Improve preparation, atomisation, distance and controlled coat application instead.
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