Aluminum Deoxidizer must be used with the Purple Metal Polish or another similar metal polish to be effective. This is a very Hi-Tech chemical designed to clean and deoxidize ALL metal surfaces without streaking, hazing, burning or damaging the surfaces. Removes scale, road film, most acid stains and even rust on Chrome! It is the easiest and safest way to prep the metal before polishing. It really takes the elbow grease out of polishing! Can be used with most cream type polishes. It really works great! WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.