Iron & fallout remover's unique gel formula clings to vertical surfaces so it can really dig in and break down bonded ferrous (Iron) contaminants that have penetrated into the surface. Once inside, these contaminants introduce corrosive compounds that eat into the finish's sub-layers. Mechanical solutions like clay typically remove above-surface contaminants, leaving the embedded below-surface particles intact. Iron & fallout Remover invades the paint or metal to produce a truly deep cleaned surface. We've also made it color changing so you can see the impurities melting away in real time. Our acid-free, pH-balanced formula makes Iron & fallout Remover the safest way to remove troublesome rust, embedded Iron particles, and fallout. . . and it smells good too, emitting a pleasant citrus fragrance.