Restoration and varnishing
Oil paints usually consist of earth pigments mixed with either linseed, poppy or walnut oil. Time often takes a heavy 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.