Many objects are displayed in the open due to their size or preferred presentation. Occasional accumulation of dust is inevitable. So, how do you remove it?
The days of dust rags and feather dusters in museum settings *should* be over. For many art objects, low cost goat hair hake brushes from an art supplier are preferable. These brushes should be used in tandem with a HEPA (high efficiency particulate absorption) vacuum so that the dust is just not re-circulated back onto the object, or into your airways.
Every conservator has their favorite brush. Here are a few of my go-to brushes. Work with a conservator (find one at the American Institute for Conservation website) to establish an appropriate maintenance plan for collections on open display.