Fabric painting with a marker pen or paint pen rather than brush and paint is particularly useful when it comes to painting this lines.

(And there’s no brush to clean afterwards!) But that’s hardly the only thing you can do with fabric marker pen or paint pens.

These markers are in Bullet tips measuring 4.43mm

They give you great control for “coloring in” work easily with stencils, and can be used with rubber stamps.

Fabric marker in a pack of 10 pcs.