
Orange Peel
When the coated surface develops a kind of finish that resembles an orange peel, the defect is termed Orange Peel. The coating is not smooth but exhibits the texture of an orange.
Possible Causes |
Solutions |
Improper Thinning of paint |
• Choose solvents that evaporate slowly. • Use recommended amount of thinner. |
Using Poor Grade Thinner | Use better grade thinner for material. |
Failure to Deposit a Wet coat |
• Check solvent. • Use correct spread and overlapping of stroke. |
Material Not Dissolved thoroughly | Mix material thoroughly |
Presence of Drafts (Synthetics & Lacquers) | Eliminate excessive drafts |
Presence of Low humidity, causing rapid dry conditions | Raise humidity of room. |
Defect due to problem in the Spray Gun
Stroking is too Rapid | Stroke slowly and make deliberate slow spray passes. |
Air Pressure is too Low in the Spray Gun | Increase atomizing pressure or reduce fluid pressure. |
Using Wrong Air cap | Select correct air cap for the material and the feed. |
Fluid Pressure in the Spray Gun is High | Decrease the fluid pressure |
Holding the gun too Far from the Surface or too Near | Hold the spray gun at a distance of 6-10 inches from the surface. |
Spraying is Striking a Wet and Sprayed surface |
• Do not over spray. • Ensure not to spray on a surface that has been sprayed already. • Spray detail parts first and end with wet coat. |
Air Temperature is too High and Hot | Use retarder solvent to lower the temperature. |