duster will suck if you have particles stuck to your car. It will leave black marks, (in my case since i have titanium silver). Also you have to make sure the car has wax on it for duster to work. I stopped using my duster after 30 days. I couldnt take those black marks, just gave me more work on the car. So i would say unless you wax your car every 2 weeks and clay bar your car F DUSTER.