1.   Rock dust coated his hair.

2.   I shut them down, close them up and cover them with a towel, but the dust still coats the screens, keyboards, touchpads.

3.   Now the dance floor has holes in it, dust coats everything, and plaster has fallen from the ceiling.

4.   Aluminum dust had coated his lungs.

5.   The dust has coated windows and cars.