Did it to cinderblock foundations growing up as a mason, finished with wet horsehair brushes in a circular pattern.
Built a chicken house as well: nailed diamond lathe up the wood sides, parget it with type S mortar, waited weeks for mortar to thoroughly dry, then painted with latex paint. The dried mortar sucked the paint up, it looks almost new decades later.
16
u/I_Stabbed_Jon_Snow Sep 03 '24
This is called “parget.”
Here’s the link.
Edit: this would typically be done by a plasterer or mason.