For small areas and trim work. For doors, cabinets, cupboards, etc. For smooth, semi-smooth and semi-rough surfaces. For latex, acrylic, and alkyd paints. Doesn't leave unsightly fuzz, lint or seam marks. Foam conforms to surface irregularities and provides contour coverage. Will not "mat down". Has a "reservoir action" and carries most of the paint below the surface in thousands of tiny open cells. Less frequent "dipping" and less "spreading out" of paint. Cleans quickly and easily.