The life of farm buildings today can be extended and their appearance greatly enhanced by appropriate treatment and painting. Apart from aesthetic considerations and the satisfaction derived from a visually pleasing environment, paint protects surfaces from rain, sunlight, abrasion and chemical substances. The cost of the paint relative to the inconvenience and cost of the painting operation is such that, using inferior materials, not carrying out proper surface preparation or applying the correct number of coats is false economy.
Painting systems usually comprise of a primer, undercoats and finishing coats. The primer must adhere to and seal the surface while undercoats must stick to the primer as well as fill surface imperfections and provide a proper base for the finishing coat. The finishing coat protects the surface against weathering and other damage and determines texture and colour.