These are the basic tools I use for this. A few ball end tools different sizes and a tool I made out of steel wires bunched together and soldered into a piece of brass square tude. Basically it's a small steel wire brush.
I just smash on the hair form and push it around with the different size ball tools.
Then I stipple in the tighter texture with the wire brush tool.
I go back and forth with the ball tools and wire brush tool depending on how tight I want the final hair texture. From Jerry Curl to Nappy and in between.
I then lightly brush it down with Turpenoid and a soft brush to knock out the hard edges.
I then lightly stipple the surface with a stippling brush.
Especially if I want the tight kinky look.
That's about it. You can make it as tight or as loose as you want.