I finally finished compressing the earth plaster wall in the spare bedroom while my family went and jumped out of a perfectly good airplane.
Compressing a wall that has been earthen plastered means that it will not dust. The way I am doing it here is with a sponge and water. You use pressure, water, and the sponge to smooth out the surface and compact it. You can also use a trowel to do the same thing but it takes MUCH longer but the surface can be as smooth as glass. This is just wall is unique and lovely. Now to finish the rest of the room for whenever Nilgun chooses to come home.