Hi
They tend to do more scarification and then push in the pigment (if any is used at all) to create the swirl or dot effect.
Tools used can be any sharp object really from wooden or bone combs to sharpened sticks or razor blades.
However many use modern tattoo techniques.
I spoke with an Australian colleague and they suggested visiting the Yorta Yorta (sp?) tribe in Victoria to enquire about traditional tattooing – they are supposed to be quite friendly.
Hope that helps.
Take Care
Matthew