There are several synonyms for the phrase "apply paint." Some of the most commonly used synonyms include "paint on," "coat with paint," "brush stroke," "slather on," "apply a layer of color," "cover with pigment," "put on a fresh coat," "spread a coating," "apply a finish," "put a coat of paint on," and "dab with paint." Each of these phrases conveys the same general meaning of adding a layer of paint to a surface, but they offer slightly different connotations and tones, depending on the intended effect or purpose of the painting.