In the water tank, there would need to be a scrubbing of sorts, perhaps locking the astronaut's boots to the floor for a shot from the surrounding water jets, particularly if the tank/airlock is to be flooded as well.

Gases would have similar problems, depending upon where one happenes to be. Utilizing asteroids for Mars transits, and the Martian moons as way-stations raise gravity issues. Is is suspected that asteroids have an abundance of dust, estimated to be about waist deep on Phobos.

for both, you would need to have all outboard accuterments reenforced, or they's just wash away when the chamber cycles -- possibly clogging vents.

A ladder out of the soup would likely be the best shot. then there's the matter of cosmicly-charged Pasien (sp) electrons in the dust, which make the particles buoyant, and help them to stick to astronauts (as they did with Project Apollo). This might be corrected with the use of a mild electric charge of the suit to repel the particles.

Dan