How long should a high quality paint brush last?

While high quality brushes provide a superior finish and covering, it highly depends on the surface that is being coated. For example when staining a rough cut board you could wear out more than one brush before the project is finished. On the other hand a brush that is used on trim or walls can last for many projects or even years if properly cleaned and cared for. When selecting a brush for your project always find the appropriate one for the application and select the best quality for the best finish results.