A few leveling layers of mud with finer sifted materials brought the floor ‘close’ to level.
Then 4 coats of alis (clay paint ) with fine sand and clay. I still had some left over red clay from a cut off the road near Albuquerque, so I soaked it and whipped it with the paddle mixer for a few days. The alis had 20% wheat paste mixed in for added durability. Then sponged it on, rubbing out any small divots in the floor. Hitting it with the pool trowel to work it in smooth. As it dried I buffed the floor out with a piece of cloth to remove any excess sand or debris. Swept and let it to fully dry before applying the oil.