Dynabrade Inc. (www.dynabrade.com) introduced electric and airpowered random orbital polishers that eliminate swirl marks from a variety of surfaces. The company says the polishers oscillate with a large, offset random orbital pattern to simulate a hand motion and to remove the swirls associated with buffing and polishing. Electric polishers have 9-ampere motors and operate at a maximum of 2,000 rpm. Air-powered polishers are either 0.7 horsepower, operating at 2,500 rpm, or 1 horsepower, operating at 2,800 rpm. Both tools operate on shop air at 90 psi.