Brushes used for figure painting vary by the type of paint used and techniques employed. For paints that require specific chemical thinners, such as enamels, lacquers, and oils, synthetic fiber brushes are often recommended for longer life as the thinners can cause natural fibers to deteriorate over time, although natural bristle brushes are often used for finer details. For acrylic paints that can be thinned with water there is less concern about bristle deterioration. Many acrylic painters consider kolinksy sable watercolor brushes the be the best quality brushes for painting, as they offer a great deal of control over the flow of paint and a sharp, precise tip for painting fine details. Brush sizes can vary depending on the task. Some painters use extremely small brushes for painting the very fine details of a model. When working with slow drying paints such as enamels this can be true as the smaller brush sizes can produce finer lines more easily. However, when working with fast drying acrylics the small amounts of paint in a small size brush can dry quickly in the bristles, damaging the brush and making painting difficult, so many highly skilled display and competition painters advise against small brushes, instead recommending using larger brushes that have very finely pointed tips, such as kolinsky sable brushes, for precise and detailed painting.