Abstract: An adjustable paint guard for filling the opening of a door frame so that one side of the door frame can be quickly painted without having paint strike the other side of the door frame includes a multi-panel nested arrangement wherein at least one panel serves as the stationary base panel from which the other panels are capable of selective and independent slidable movement along an x-y axis whereupon all the panels can be brought into abutting relationship with the interior vertical and horizontal portions of the door frame that surround the opening thereby completely filling the opening of the door frame and closing off the opening so that paint cannot reach the opposite side of the door frame.