Aztec Products Inc. has introduced the DiamondShine concrete floor polishing machine to its line of floor buffing and stripping machines. The machine’s 17-horsepower Kawasaki propane engine drives 3 diamond heads at 1,100 rpm. This speed, combined with more than 400 pounds of head pressure, makes the DiamondShine ideal for honing, polishing and light grinding of commercial and institutional concrete floors. Another benefit of the DiamondShine is that, because it runs on propane, no outside power source is needed. ? www.aztecproducts.com