CHALK RUN-DOWN:
The washing down of chalk from an excessively eroding paint onto another area below (a brick foundation, for example), ruining its appearance (see Chalking).

POSSIBLE CAUSES:
• Use of a lower quality, highly pigmented paint.

• Use of an interior paint for an outdoor application.

SOLUTION:
• Remove as much of the chalk residue as possible(see Chalking). Scrub any stained areas with a stiff brush, using a detergent solution; rinse thoroughly. In cases of severe staining, an acid wash may be necessary. Either way, if the affected area dries to a different colour, consider painting it with a quality water-based paint.

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