CarPro Iron X 4 Liter Refill Removes Iron Particles and prevents the spread of iron-related damage & helps to protect your vehicle from paint system failure. New Formula combines Cherry perfume to aid in masking Iron Dissolving Chemicals Safe to use, Acid Free,and pH neutral (pH 6-7). Safe to use on Clear Coat Paint Safe to use onAluminum, Chrome, Anodized, Alloy, orClear coated wheels.