Somebody had posted a ~67 page long detailing guide a while back and it says using the duster is fine. I'm sure any scratch it could make wouldn't be deep enough to go through the wax that I'm sure most CEGers put on their cars.
98.5 SVT
91 Escort GT (almost sold)
96 ATX Zetec (i brake to watch you swerve)
FS: SVT rear sway bar
WTB: Very cheap beater
CEG Dragon Run - October 13-15