If something has metal parts and moves, then fluid is most likely lubricating it. There are lots of moving parts in a car and many kinds of fluids. Fortunately, fluids differ in color, texture, and smell. Once you know what to look for, finding the source of your leak is much easier.
General Fluid Leak Tips
Keeping them looking good is easy. Use a “fat” soft paint brush with a mild detergent to clear away brake dust. “Simple Green” sold at Home Depot works great.
Stay away from car washes that use very strong brake dust cleaners. This can be very acidic and can dull the finish of your rims if it is not completely washed off and allowed to dry or cake on.