D5 Iron Remover Is a highly effective acid-free, non-caustic, pH balanced, cleaner for all types of wheels: steel, alloy, chrome, painted, powder coated, uncoated and anodized aluminum. Effortlessly loosens and removes stubborn grime, such as burnt-on brake dust, oil, grease, rubber residue and other road dirt from wheels, rims, hub caps and lug nuts. Turns a plum color while complexing with iron contaminants.