A panel overlay system for embellishing an existing metal multi-panel articulating overhead garage door is disclosed. Plural lightweight panels are removably attached to the panels of the existing garage door with magnets. Each panel comprises an underlayment sheet that provides a relatively rigid structural backing, and thin wood veneer adhesively bonded to the outer-facing major surface of the backing sheet. The veneer includes plural vertical demarcations; when multiple panels are installed the demarcations on adjacent panels align to give the appearance of elongated vertical boards. Vertical and horizontal members are placed at desired positions on the veneer—typically the vertical members are aligned along the side edges of the panel and the horizontal member extends across the middle of the panel so that the entire installation provides the appearance of a garage door typical of the well-known rail and stile carriage house design.