While using the water-soluble dope, wet brush with water first before applying paint with a brush. While using the oil dope, wet the brush with alcohol. Remove surplus liquid that brush suck, make brush tide but wet, which make brush absorb the dope more better, and easy to paint.
    Soak 1/3 or 1/2 of the brush hair in the dope, push gently inside of the dope container, and extrude surplus dope from brush. When applying dope with a brush, brush and coating surface should keep 45 degrees, exert certain pressure, and make the brush hair bend slightly. After brush each time, lift brush gently, the brush mark should be longer and flat. In order to coat with excessive dope, we should brush from non-paint area to paint area. When paint timber with a brush, we should paint with a brush along the direction of wooden veins.
    Finally, use paint with the brush gently along with the direction of brush, which can gain paint film that is comparatively smooth, , plump, and bright.