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Paint Finish Problems - Sanding Scratches
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Paper trace or hairline scratches in the old paint film or basecoat develop and appear magnified by the solvent contained in the topcoat.
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CAUSES:
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Sandpaper used for sanding too coarse. | |
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Basecoat was sanded before it completely dried. | |
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Applied excessively diluted paint in coats that were too thick. | |
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Paint topcoat film too thin. | |
PREVENTION:
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Use correct grade of sandpaper according to the type of topcoat. | |
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Apply basecoat and allow sufficient drying time before sanding. | |
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Apply topcoat mixed with the proper amount of paint reducer/thinner allowing proper flash time between coats. Apply topcoat in several steps. | |
CORRECTIVE ACTIONS:
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If the symptom is not severe, polish the surface with compound after drying completely. | |
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If the symptom is noticeable, wet sand the area and repaint. | | | | 
