Thanks for all the help.
The walls are mostly done.
Still have to put top caps on.
We ended up compacting the ground beneath and leveling with sand.
We mortared them together and filled with concrete.
We are going to leave the face as-is at this point.
They have been in a green house for the past ~30 years and have nice looking water lines on them. If the lines wash away or ? we may stucco or paint in the future.
