Removing garage and environmental "dust" without washing

[slalom38]

I have a metallic black macan 5 months old.  It will sit in a garage a week at a time, and when it comes out, it has a layer of dust.  Up in the country, the environment is dusty, so the car picks it up.  

 

What's the best way to remove the dust and maintain the shine without having to go through a complete wash?

 

I've used a California duster, but I feel like that's abrasive and not the best solution.

[falcaineer]

I think many will agree the duster isn't the best option, as well.

 

Try this instead: http://adamspolishes.com/shop/exterior/carwashing/adam-s-waterless-car-wash.html

[Chris@Adams]

Larry my 2005 GTO (BLACK) has only been washed with water 4 times........after every drive or after she has been setting in the garage I wipe her down with WW & WW MF Towels or for light dusting DS.

And the paint is 10 times better than it was when new.