Dust brushes

Pick yourself up a shaving brush - the kind for making your own shaving cream from soap.  The brisles (sp) are soft but stiff enough that you can push off the thickest dust but will smoothly move around PE without ripping it off.

Thanks Gerald and Easymike.

Steve

Head for the ladies cosmetics section of your local drug store and purchase a make up brush.  The bristles are soft enough to be used on a lady's face, so you won't harm your models when you dust them. 

Check your local craft store for long soft bristle brushes. I have a couple of very soft one inch wide general purpose paint brushes that I picked up at the hardware store. Using your air hose from your airbrush works too. Also check the make up department of the drug store, look for those powder application brushes, they work too.