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Equipment Troubleshooting: Pinholes |
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Cause
- Improper surface treatment or lack of surface
treatment (on magnesium)
- Entrapped oils and/or solvents
- Insufficient primer drying times
- Use of improper thinner
- Use of fluid tip: too small or too big
- Material sprayed was too thick
Prevention
- Apply manual surface treatment and ensure complete
coverage of the magnesium with surface chemical film,
before wash primer application
- Microscopic examination of stripped paint removed
during tape test
- Check mixing instructions to eliminate use of improper
thinners
- Mix in the correct ratios using a measuring stick
Remedies
- Strip and clean or sand down and repaint |
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