Underlying surfaces visible through the paint film, most frequently in hard to spray areas, on lower panels or on sharp edges and contours.
Causes
- Inadequate thickness or poor covering power of the color coat. This is frequently due to:
- Poor spraying technique
- Inadequate lighting, insufficient or cramped working space, inaccessibility of surfaces
- Poor mixing of materials
- Reduced thickness of the color coat due to excessive compounding and polishing
Prevention
- Use the correct spraying technique; ensure even and adequate film thickness
- Work under good lighting conditions in a properly sized spray booth; pay special attention to inaccessible areas
- Ensure that the materials are thoroughly mixed
- Avoid excessive compounding and polishing on single-stage colors
- Take special care on edges and sharp contours
Correcting
- Sand the affected area and repaint
