to fill, or cover the holes, etc. in, with spackle
See Spackle in American Heritage Dictionary 4
(spăkˈəl)
A trademark used for a powder to be mixed with water or a ready-to-use plastic paste designed to fill cracks and holes in plaster before painting or papering. This trademark often occurs in lowercase and as a verb in print: “Two young men quietly spackled and whitewashed the walls . . . for an exhibition” (New York Times).
