I have not had any personal experience with the car dusters. I wouldn't use one on my car. For keeping a "indoor" car dustless they seem to work well, but for real-world applications with salt/grit/grime/mud/bird droppings/etc I'm not sure how safe they'd be for the finish. However, I have only ever seen them used to remove the lightest of dust. Just a tiny bit of light particulate you could probably remove most of with a sharp breath. If someone tried to use it on heavy surface dirt or road grime I imagine it would scratch the paint and gum up the duster. Car wash is cheap, water is cheap, paint jobs or major re-conditioning is expensive. Definitly something to use with care. Just my observations...Lee