PAINTING WITH THICK INVOICE PAINTS
Check it out, whether the surface is clean, dry, solid and free from flaking paint or discoloration.
Some types of coarse texture paints produce the desired effect when applied with a brush or roller.
You need others – after applying an even and smooth layer – properly model.
There is a great variety of tools for this purpose: plaster comb, stippling brush, round brush, profiled rollers.
It is worth experimenting a little on a piece of plywood, so as not to waste time fixing mistakes later.