How to make cement Buddha statues?

Ordinary cement has a large shrinkage ratio, so the image will crack after solidification and dryingCement mini Buddha Statues
If you want to prevent dry cracking, you need to add a corresponding proportion of "white cement". White cement has the opposite characteristics of ordinary cement. After drying, it will expand, and after mixing, it will offset the shrinkage of ordinary cement.
Cement is a binder, should it be mixed and filled with sand? I don’t know the exact image, but it’s generally like this
Generally speaking, for the basic part, use masonry to form the basic shape. After drying, cut off the corners and protrusions to make a master model. Then use the cement sand mixture to smear the filling to form a certain relatively similar appearance. After drying, it needs to be further modified, there should be many times of processing.
I'm just talking about how to make Buddha statues based on ordinary cement modeling. People who have done it should be consulted. They should have detailed methods and steps.