TechnicianVision · Knowledge base
Back-To-Basics: Mottling or Streaking
I-CAR · November 7, 2018
Summary
This article outlines the causes and prevention of mottling or streaking when spraying metallic paint, which occurs when metallic particles float together to form uneven patterns or tiger stripes. It emphasizes proper spray gun setup, correct application techniques, and adherence to paint manufacturer guidelines to avoid these defects.
What to do on the job
Test the spray gun pattern before painting, maintain a 90-degree gun angle to the panel, and follow the paint manufacturer's instructions for applying a control coat if mottling occurs.
How to use it
Use this document to justify the necessary time and materials required for proper spray gun setup, test pattern spraying, and the potential application of a control coat as recommended by paint manufacturers to prevent or correct metallic paint defects.
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