The Meguiar's Iron Removing Spray Clay helps dissolve embedded iron deposits and industrial fallout from various surfaces! One quick treatment can remove the vast majority of contaminants on your vehicle's exterior surfaces (i.e. paint, wheels, trim, etc.). This helps ensure you have a clean surface, saving you so much time with a clay bar so you can get better results from your polish, coating, sealant or wax. Avoid direct sun and letting the product dry out during use. To use it, mist it on the paint, wait a few minutes and watch the formula change colors to deep purpose as it dissolves iron deposits, then rinse off or wash off, it is that easy. Upon completion, you will be stunned at how much has been removed with such an easy application process. With that said, there can be times when you have heavy contamination and agitation with your favorite brush or wash mitt will be needed. Thoroughly clean the surface of your vehicle with the Meguiar's Iron Removing Spray Clay!