Bryn Crandell
If you just want to get rid of the dust, I use a large makeup brush. I had to ask the wife and its a blush brush. Soft bristles yet enough to scrub the dust off. I also use a variety of broad painters brushes to clean my builds. I've used a dust off spray that is used for silk flowers. Haven't tried it on my aircraft, but have used it on our training simulator here at work(similiar to a model railroad.)

James Skalicky
Thank you all! This is going to be a complete redo, as many of the seams have come apart over the years and I found today that the decals came off while attempting to get rid of the dust. I'm not sure if the original paint is acrylic or enamel, so there is going to be quite a bit of trial and error there. There are also some inaccuracies that will need to be corrected, both with the engines (the props had three blades when my father was flying with it) and the drones. Updates may be few and far between as I am going to take this project very slowly.