A reusable shield for wall fixture control devices while painting the wall. It has an self-adjustable-depth feature that permits the shield to cover different types and sizes of fixture control devices that project from the wall, and can be sized to cover several such devices which have a common cover plate. The shield is shown to be made of two major parts, made either separately or flexibly joined, one of which is removably secured to the wall and the other of which is adjusted to accommodate the amount of fixture control device projection from the wall while preventing paint from entering the interior of the shield. The adjustable part is able to accommodate a side variety of control devices and is not shaped to be specific to any one device.