Burnishing is the change in gloss of the paint film when subjected to rubbing, scrubbing or having an object brush up against it.
Use of flat or matt paint in highly trafficked areas, where a higher sheen level would be desirable
Frequent washing and spot cleaning
Objects such as furniture rubbing against walls
Use of lower grades of paint with poor stain and scrub resistance (see Poor Stain Resistance and Poor Scrub Resistance)
Paint heavy wear areas that require regular cleaning (e.g. doors, window sills and trim) with a premium semi gloss or gloss acrylic enamel. This type of paint offers both durability and easier cleaning capability. In high traffic areas, choose a low sheen, semi gloss or gloss rather than a flat sheen level. Clean painted surfaces with a soft damp cloth or sponge and non-abrasive cleansers; rinse with clean water.
Yellowing describes the development of a yellow cast in ageing paint solvent-based enamels.
Wrinkling is a term to describe a rough, crinkled paint surface, which occurs when uncured paint forms a 'skin'.
Sagging is the downward "drooping" movement of the paint film immediately after application that results in an uneven coating.