Nanoskin Wheel Tire & Metal Clea ner is a low Ph organic salt that performs like an acid. It is non-corrosive to skin and metal per DOT/TDG test protocol non-fuming and is DOT Non-Regulated . WTMC safely removes grease road grime light oxidation and brake dust from metal pai nt and other hard surfaces. Safe on all types of wheels including clear coated pai nted aluminum polished and anodized. Great for removing water spots. New technology chemi cally embraces and lifts mineral deposits and protect surface from future water spots. NOTE: WTMC can be used to replace HCL acid in many applications and offers significant performance advantages vs. acids such as phosphoric citric hydroxyacetic sulfamic oxalic etc. with regards to removal of calcium lime and ru st. Compatible with EVERGREEN Multi-Function Cleaning Gun Dilution: Wheels & Rims 9 : 1 Water Spot Remover 9 : 1 Diamond Plate 9 : 1 Car & Truck Washing 250 : 1 Directions: Eye protection is recommended. 1. Test an inconspicuous spot for surface compatibility. 2. Spr ay even on cool dry surface. 3. Allow to soak for 1 to 4 minutes. 4. For extremely dirty wheels and tires agitate with a soft brush or sponge. 5. Stand away from surface and hose off thoroughly with strongly water spr ay. 6. Dry surface immediately with a clean soft towel to prevent water spots.