best way to clean off "heavy dust" from car? wash or use duster?

[paradigmGT]

I washed my car a month or two ago, and had put a car cover on it and left it parked in my underground parking.` Anyhow, someone decided to rip the cover off the car, and it started to it started to accumulate dust.` I did not want to replace the cover because clearly the car is attracting attention with it on.


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The dust is now very thick on the car.. I do not feel comfortable wiping it off with my california duster as I am afraid it is just too much dust, and it may cause more harm than good.`


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Should I not worry and use california duster despite the "heavy dust", or should I just wash the car?


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Here is a pic of how it looks as of yesterday:


http://i6.photobucket.com/albums/y242/kingrukus/dust_zps899a51c1.jpg

[cobrar97]

You`d definitely want to wash it at this point.

[Accumulator]

Yeah, wash it.


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Noting that I can`t CCD/etc. without inducing some degree of marring anyhow....IMO if you wonder for even`a moment whether you oughta wash, the answer is "yes".