Painters and decorators prepare and finish interior and exterior surfaces in homes, workplaces and other buildings. Their work commonly includes painting walls, ceilings, doors, windows, woodwork, metalwork and outside walls, using suitable paints, stains, varnishes or protective coatings. They may also apply wallpaper, lining paper and other wall coverings, and finish features such as decorative mouldings. Before decorating, they typically assess the surfaces, protect floors and furnishings, and carry out preparation such as cleaning, sanding, filling small cracks and holes, removing loose paint or wallpaper, and applying primer or undercoat. Some undertake minor repairs to damaged plaster or woodwork, while larger repairs may require a separate trade. Customers may arrange work for a single room, a full property or a commercial site, with the scope depending on the condition of the surfaces and the finish required.