Air-drying touch-up paints have different weathering characteristics to the baked-on finish of pre-painted coating systems and variations in natural light conditions will emphasise these differences, producing an unacceptable aesthetic appearance.

Spray cans should not be used for repairing scratches on pre-painted sheeting.

If the scratch is obvious from 3 m, the sheeting should be replaced, if not then it should be left alone. Minor surface scratches become less noticeable as the coating weathers and are best left as they do not appreciably affect the corrosion inhibiting properties of the material.

Widespread damage caused by rough handling or an accident, however, should not be corrected by repainting, but the affected material should be replaced.

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Revision Category: 
1 - Minor Errata
Revision Detail: 

Changed punctuation in heading for consistency.

Draft Clause: