We've mixed up some normal black and white paint and added some textile medium (no need for expensive fabric paints). The textile medium basically makes it a washable fabric paint, that way you can get exactly the colour you want using normal everyday paint.
It's a good idea to lay some paper or cardboard through the middle of your skirt so that the paint doesn't seep through. Start stamping.
You can mix up your shapes or you could stick with just one...it doesn't really matter. Keep stamping until you've covered your garment. Once you've finished and the paint has dried, you should lay a cloth over it and iron with a hot iron to heat set your design. Voila! It's really that easy!