Forrester began painting in the early 1990s. He paints stories from the Dreamtime. He has said that his art represents a story and a "spiritual legacy" for his descendants. Originally, he used acrylic paints, but he has since began using natural ground-up paint made at Uluṟu. Traditional methods, tools and techniques are used to grind natural pigments into powder form, and then mixed with a binder to become a thick, sticky paint. The colours Forrester uses in his paintings are the traditional colours used for ceremonial body paint.