Did some construction with that back home.
Notice that a problem here is with moisture seepage leading to mold, paint peeling etc..
There are some 'homemade' recipes to avoid costs of importing 'QuikWall' etc., but not a lot of luck talking it through at the local block supplier.
Advantages:
No mortar required, tensile strength of wall exceeds tensile strength of blocks, just stack blocks and 'stucco'.
So it look to me like the normal method is: Lay blocks in mortar, then stucco, then paint.
In this case, just dry stack, apply surface bonding as the 'stucco' w/ the interior color already mixed in. So thus gain full waterproofing and avoid laying the blocks in mortal, waterproofing and painting with a stronger finished product.
Kind regards,
JR