This is the advice old timers follow regarding cleaning with compressed air:
from Keep Your Lathe Clean
, August 1946 revision.
Vacuuming is preferred because damage may be done if fine dust is blown into machine bearings. Vacuuming also minimizes the amount of airborne dust, which is better for our lungs. Brushing may be an acceptable alternative, but brushes can't always get into the hard-to-reach places.
Grinder cleaning, like tamping, is grossly over rated