Occurrence
Insufficient coverage - the substrate is visible through the topcoat layer.
Causes
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Insufficient mixing of topcoat before spraying
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Topcoat layer sprayed too thin
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The varnish used has uneven pigmentation
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Adding too much or using wrong thinner
Prevention
- Spray a neutral primer
- Observe the recommended layer thickness
- Avoid using too much thinner
- Mix the varnish thoroughly before application
Removal
Sand with P800/P1000 sandpaper after drying and re-paint.