Well, Joshua, I am not going to be much help here. With earthen mud, it is not a matter of timing as in number of hours or days. What you will want to do is learn what to look for to know you are ready to move to the next step. The drying depends on so many things, like relative humidity, how much wind is blowing- or light breeze- how wet it went up, how thick a layer.
I searched the building forum, here is the link that will take you to where they discuss finishes.
https://permies.com/forums/f-154/Finishes
You can browse there for conversations about the process you intend to use on your structure. You can follow the link, and repost your question there...
hope that helps
Thekla