There's a medium between painting the face and not washing it.

The saying urges moderation in personal appearance. One need not choose between heavy cosmetic display and complete neglect of cleanliness; a sensible middle course is available.

More broadly, it rebukes all-or-nothing thinking about grooming or presentation, while retaining the image of avoiding two visible extremes. Care can be appropriate without excessive ornament or neglect of ordinary upkeep.

Use it when advising someone to balance grooming and adornment, especially when a discussion falsely presents elaborate beautification and neglect as the only choices. Its imagery is pointed and may sound critical, so it suits candid advice more than delicate reassurance.