Restoration and varnishing
Oil paints usually consist of earth pigments mixed with either linseed, poppy or walnut oil. Time often takes its toll upon oil paintings and the moisture in the original oil dries out. Sometimes, moisture enters the paint mix and a whitish "bloom" appears on the surface. These problems can be rectified by cleaning and the application of a resin-based varnish which rejuvenates the pigment, giving the painting that "freshly painted" look and preventing any future deterioration.