Ever since i bought the mothers wax attack machine, my car is still smooth and shiny after one month. It rained during that time and all i did was take it to the car wash and rinsed the car thoroughly. Then chamois'd it good. Did this about 3 times during the month and still retains its silky smooth shine. Compared to hand waxing days, pretty much after 1 wash, wax all gone and back to rough nuts surface