A fine finished brush is used to eliminate brush strokes. Natural bristles are made from animal hair, usually hog or badger. Natural bristle brushes are used for applying oil based alyked paints. High-quality natural China bristle brushes have qualities that control oil-based coatings for better flow and leveling for the smoothest finish. A natural China bristle brush is the best choice for oil-based paints, stains and varnishes. Badger hair brushes are ideal for varnish, topside and high-gloss marine coatings.