Sometimes my car is dusty but clean under the dust. I've asked a couple of people about this and they said It's best to wash it again and never use a duster or wipe the dust off.
So why is it that when I go to car shows or watch one on TV, I often see people dusting their show cars with a big fluffy duster? I guess it's because they don't have the option to properly wash their cars once they are at the show.
Please chime in people!!