Abstract: A workstation for cleaning or machining workpieces such as foundry castings includes a rotatable workpiece support positioned above a ventilated surface of the workstation. In operation, a workpiece is mounted to the rotatable support and rotated as necessary during a cleaning process to enable a user to conveniently access various surfaces of the workpiece. The cleaning process can include chipping, grinding, sanding and polishing steps. The rotatable workpiece support can include a mechanical clamp or a turntable which can be operatively locked in a desired position. Positioning of the workpiece relative to cleaning tools will reduce worker exposure to respirable particulates.