When To Use Magic Erasers. Remove rust stains from PVC pipes under sinks, behind toilets, and on the floor of the vanity. Get the interior of your dishwasher white again. Clean the oven to look like new. Clean stains from your smooth top stove. Get scuff marks and stains off vinyl flooring. Remove the water mark from the sides of your pool. Make glass shower doors sparkle. Pull stains out of carpets and rugs. Refresh older laminate countertops like nobody's business.