I found a friend of mine who applied Cilajet to his M3 and X5 around a year ago and let me tell you they looked like they were detailed yesterday! We poured water on them and it still beades. His X5 was dirty and we washed some bugs off the front and it was a breeze to clean it and so were the wheels! Having my car done this week. Great product!! With a 10 year guarentee!!