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Paint Application Problems - Runs
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Paint film is not even and it is partly very thick and running down.
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CAUSES:
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Wrong reducer/thinner used for ambient conditions (solvent evaporation too slow). | |
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Paint mixed improperly or coats being applied too thick. | |
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Spray pattern improperly adjusted or incorrect spaying technique. | |
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Low temperature slowed drying process. | |
PREVENTION:
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Use an appropriate paint reducer/thinner. | |
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Adjust the paint mixing proportions and/or spray viscosity. | |
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Avoid applying paint in single thick coats. Apply several thin coats, allowing sufficient “flash” time between each. | |
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Adjust the spray pattern before application. Test-spray the pattern and operate the spray gun with correctly and consistently. | |
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CORRECTIVE ACTIONS:
Force dry the affected paint area carefully to prevent pin holes (bubbles). Wet sand to remove the run, then touch up the surface with compound or repaint.
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