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Problem Solving |
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| Mouse over an image to read the details. |
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| Adhesion |
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| Appearance |
| Coating is easily removed from substrate or from primer coat, but hardness and mar resistance are maintained. |
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| Causes |
| Improper surface preparation.
Painting over oil, grease or other contaminants.
Improper curing schedule.
Poor substrate integrity.
Incompatibility of one coat to another or to substrate. |
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| Remedy |
| Remove coating, pretreat properly and refinish.
If poor substrate integrity, problem may not be solved. |
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| Troubleshooting |
| Ensure proper pretreatment.
Surface to be painted must be thoroughly clean and dry.
Use recommended curing schedule
Ensure that substrate has good integrity.
Follow acceptable practices using compatible materials.
Possibly sand or scotchbrite surface to be painted. |
| Air Entrapment |
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| Appearance |
| Small crater like openings in or on the paint film. |
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| Causes |
| Spray gun travel too slow.
Spray gun distance to close.
Air pressure to low.
Improper spray gun setup. |
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| Remedy |
| Sand with 1200 or finer grit sand paper, then compound and polish to restore gloss.
Or, sand and refinish. |
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| Troubleshooting |
| Maintain correct spray gun speed.
Maintain correct spray gun distance.
Use the recommended air pressure.
Use the correct air cap/nozzle/needle recommended for the clear coats. |
| Blistering |
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| Appearance |
| Small swelled areas like a water blister on human skin.
Pinpoint holes in finish.
Lack of gloss if blisters are minute.
Broken edge craters if the blisters have burst. |
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| Causes |
| Improper thinning solvent; too fast evaporating.
Excessive film build trapped solvents.
Excessive temperature in first oven zone.
Insufficient flash off time before baking.
Gasses entrapped in the substrate during the manufacturing process are forced out through the coating when baked at high temperatures. |
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| Remedy |
| Sand and refinish. |
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| Troubleshooting |
| Reduce with slower evaporating solvents.
Reduce film build.
Reduce temperature in first oven zone.
Increase flash off time prior to baking.
Reduce overall oven temperature. |
| Crater |
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| Appearance |
| Small crater-like depressions in the film. |
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| Causes |
| Improper cleaning of substrate.
Oil, water or other contaminant in spray lines.
Silicone or other contaminant in working area atmosphere.
Low film build.
Overly wet application. |
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| Remedy |
| Sand and refinish. |
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| Troubleshooting |
| Surface to be painted must be thoroughly clean and dry.
Increase film build.
Use proper maintenance to prevent contaminants from entering spray lines.
Eliminate contaminants from entering application areas.
Spray the coating "drier" using multiple passes.
Increase viscosity of paint. |
| Dirt |
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| Appearance |
| Foreign particles dried in paint film. |
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| Causes |
| Improper cleaning of the substrate.
Defective air regulator cleaning filter.
Dirty working area.
Defective or dirty air inlet filters in spray booth and/or ovens.
Dirty spray equipment.
Dirt in oven or paint.
Insufficient agitation or paint settling. |
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| Remedy |
| Sand and refinish. |
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| Troubleshooting |
| Clean surface thoroughly.
Be sure all equipment is clean.
Replace air inlet filters if dirty or defective.
Maintain a clean spray area.
Clean or replace filters in solvent lines, air regulator, compressor, and paint lines.
Keep all paint containers closed to prevent contamination.
Periodically clean ovens.
Flush paint lines thoroughly with clean solvent when not in use and prior to changing paints.
Agitate paint thoroughly before using. |
| Fisheyes |
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| Appearance |
| Small crater-like depressions in the film. |
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| Causes |
| Improper cleaning of substrate.
Oil, water or other contaminant in spray lines.
Silicone or other contaminant in working area atmosphere.
Low film build.
Overly wet application. |
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| Remedy |
| Sand and refinish. |
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| Troubleshooting |
| Surface to be painted must be thoroughly clean and dry.
Increase film build.
Use proper maintenance to prevent contaminants from entering spray lines.
Eliminate contaminants from entering application areas.
Spray the coating "drier" using multiple passes.
Increase viscosity of paint. |
| Float |
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| Appearance |
| Streaking of the color. |
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| Causes |
| Heavier film thickness in some areas.
Insufficient agitation of paint separation. |
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| Remedy |
| Refinish. |
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| Troubleshooting |
| Avoid heavy film buildup.
Do not over-reduce paint.
Agitate paint thoroughly before using. |
| Orange Peel |
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| Appearance |
| Resembles the skin of an orange. |
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| Causes |
| Under reduced paint.
Improper thinning solvent - too fast evaporating.
Low film build.
Improper air pressure.
Lack of proper flow.
Paint temperature too low.
Substrate temperature too high. |
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| Remedy |
| Sand and refinish. |
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| Troubleshooting |
| Lower viscosity of paint.
Reduce with slower evaporating solvents.
Proper air and application equipment adjustments.
Maintain constant paint and substrate temperature. |
| Pinholes |
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| Appearance |
| Small swelled areas like a water blister on human skin.
Pinpoint holes in finish.
Lack of gloss if blisters are minute.
Broken edge craters if the blisters have burst. |
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| Causes |
| Improper thinning solvent - too fast evaporating.
Excessive film build trapped solvents.
Excessive temperature in first oven zone.
Insufficient flash off time before baking.
Gasses entrapped in the substrate during the manufacturing process are forced out through the coating when baked at high temperatures. |
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| Remedy |
| Sand and refinish. |
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| Troubleshooting |
| Reduce with slower evaporating solvents.
Reduce film build.
Reduce temperature in first oven zone.
Increase flash off time prior to baking.
Reduce overall oven temperature. |
| PreTreat Staining |
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| Appearance |
| Water spots.
Streaks or blotchiness visible through cured paint finish. |
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| Causes |
| Excessive pretreatment chemicals remain on substrate surface. |
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| Remedy |
| Apply primer and refinish.
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| Troubleshooting |
| Ensure sufficient rinsing during pretreatment to remove any excess chemicals.
Improve part hanging.
Design drain holes to ensure complete drainage of pretreatment chemicals. |
| Sags & Runs |
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| Appearance |
| Running of the paint film in rivulets; mass slippage of the total film.
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| Causes |
| Over reduced paint.
Improper thinners - too slow evaporating.
Excessive film build.
Paint temperature too high.
Substrate temperature too low.
Insufficient agitation of paint separation. |
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| Remedy |
| Sand and refinish. |
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| Troubleshooting |
| Use recommended thinner at specified reduction and air pressure.
Decrease film build.
Maintain constant paint and substrate temperature.
Agitate paint thoroughly before using. |
| Solvent Popping |
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| Appearance |
| Small swelled areas like a water blister on human skin.
Pinpoint holes in finish.
Lack of gloss if blisters are minute.
Broken edge craters if the blisters have burst. |
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| Causes |
| Improper thinning solvent - too fast evaporating.
Excessive film build trapped solvents.
Excessive temperature in first oven zone.
Insufficient flash off time before baking.
Gasses entrapped in the substrate during the manufacturing process are forced out through the coating when baked at high temperatures. |
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| Remedy |
| Sand and refinish. |
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| Troubleshooting |
| Reduce with slower evaporating solvents.
Reduce film build.
Reduce temperature in first oven zone.
Increase flash off time prior to baking.
Reduce overall oven temperature. |
| Wrinkles |
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| Appearance |
| Puckering of enamel.
Prune skin effect.
Loss of gloss as film dries (minute wrinkling not visible to the naked eye). |
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| Causes |
| Excessive film build.
Surface drying trapping solvents.
Fresh film subjected to heat too soon.
Contamination in oven or paint. |
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| Remedy |
| Remove wrinkled coating and refinish. |
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| Troubleshooting |
| Decrease film build.
Clean all agitation equipment and paint lines thoroughly before changing colors or products.
Periodically clean oven.
NOTE: Do not use chlorinated solvents or acid for cleaning ovens or areas around ovens. |
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