The paint brushes should be of bristles and not horse hair. bristle can be distinguished by the fact that each bristle is split at ends. A good brush should have springiness in the Bristles
The following sizes of brushes are generally used :
1. For dusting large flat surface, size 4″.
2. For girder work size, 3″.
3.Woodwork size 3″
4. for finishing work size 1″ & 2″
A round brush is considered the best for painting.
New brushes should be placed in water for two to three hours and then allowed to dry for one hour before use when a brush is to use for another color or is no longer required it should be cleaned at once by dipping into kerosene when not in use.