A chip brush is a type of brush that is commonly used for applying harsh chemicals like stain, epoxy, glue, paint thinner, and the like. It is also used for small touch-up work and for cleaning machinery. Chip brushes are made with natural China bristles that can hold up to harsh chemicals. They are disposable and are ideal for one-time use projects. The name "chip brush" comes from their original use, which was to brush metal and wood chips off of machinery. Chip brushes are available in different sizes, making them suitable for various applications.