PataPata soap wool cleans effectively without scratching. The package contains 10 pcs. lathering soap wool pads. The product effectively cleans stubborn dirt and severe rust stains. Test the product first on a small hidden area. It doesn’t scratch the surface to be cleaned as long as it foams. Soap wool is not recommended for painted or sensitive surfaces, such as aluminum. Throw away the soap wool when it is no longer lathering. PataPata consists of biodegradable natural soap and steel wool, which returns to nature when it rusts.