I have the big one and small one. Big one works absolutely perfect for dust getting dust and pollen off the exterior when a wash isn't needed. The small one is for interiors and it works well too. No scratches, no swirls, etc. They just removes the dust/pollen. Their slogan is "the dirtier it is, the better it works" or something to that affect and it is true. "California Duster" from Walmart, Advanced Autoparts, etc.
I usually use the soft brush attachment for my shop vac and then follow up with wiping it down. The brush and suction combo works great to get dust out of the nooks and crannies.
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