Scumble v. t. (past & past part. scumbled; pres. part. scumbling) (Fine Arts) To cover lighty, as a painting, or a drawing, with a thin wash of opaque color, or with color-crayon dust rubbed on with the stump, or to make any similar additions to the work, so as to produce a softened effect.
... tones, and the decorative use of powerful color is the main reliance of such painters as Hugo Ballin. But the note of color runs through the school and one hardly needs to name individual men. Whether our landscapists glaze and scumble with the tonalists, or use some modification of the impressionist hatching, it is for the sake of color; and even our most forthright and dashing wielders of the big brush often achieve a surprising ... — Artist and Public - And Other Essays On Art Subjects • Kenyon Cox