Paint Exceptions And Associated Repair Procedures (G1676685): Contamination: Description
Any foreign substance or chemicals which adhere to the surface or become embedded in the paint by chemical action. Excessive exposure to unfavorable atmospheric conditions. Contamination may appear as spots, speckles or splash-like deposits, this is often associated with stains, especially on metallic paint films.
Industrial Fallout/Acid Spotting/Rust Specks:
Airborne particles from industrial activities can contaminate paint film surfaces and may consist of various deposits. The paint surface is usually dusted with particles, tiny colored spots, minute stains, greasy or tacky spots and feels 'gritty'. When closely examined with a low-powered magnifying lens the particles may be seen embedded into or adhering to the paint, possibly with a stain surrounding it or rust, if it is ferrous, from the particle.