It is used for wood grain drawing at the time of repair painting of wood by urethane paint. I tried various brushes including other companies, but after all I came back to this brush. Solvent resistance is a remarkable thing. Although it is a consumable item, it does not compare with the life span of other company's products. Low cost is also helpful. After washing with lacine, I rinse with urethane thinner and cover the cap. It will extend the life further.