Having a successful painting experience depends on using a quality paint and a quality applicator. If you use a cheap paint brush, you'll have to live with the results - specifically, annoying bristles that break off and stick to your painted surface or unsightly lap marks that mar the looks of your finished project. To avoid these problems, it's well worth it to spend a few extra dollars for a quality paint brush. The basic elements of a high-quality brush are materials and craftsmanship. Quality brushing materials are essential.
China bristles work best in oil and alkyd paints and stains, varnishes, shellacs and lacquers.
It is recommended that natural bristle brushes never be used with latex coatings. The latter is the most popular because of superior stiffness and retention. Nylon filament brushes work well in latex paints, oil and alkyd paints, and some stains and varnishes. Polyester filaments work in most paints, stains, varnishes, shellacs and lacquers. Inside the ferrule is the plug.