Pinholes in Paint Film
Q. I am a manufacturing engineer for a company that makes aftermarket products for the automobile industry. All the parts are produced, pretreated and painted in our factory. We have been using the same solvent-based paints for some time. Painting is done by using conventional air-atomizing spray guns. Recently we started to get pinholes in the paint films. What is the cause of pinholes in our solvent-based paints, and what steps can we take to eliminate this problem? S.D.
Masking is employed in most any metal finishing operation where only a specifically defined area of the surface of a part must be exposed to a process. Conversely, masking may be employed on a surface where treatment is either not required or must be avoided. This article covers the many aspects of masking for metal finishing, including applications, methods and the various types of masking employed.
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