My son left home last week and I am both :) and :( at the same time. There was a pile of stuff that he no longer wants and amongst it was some sculpting hair wax, and rather than just chucking it out I wondered whether it would work as a resist. Above are my experiments, applied with the finger [left] and various tools [right] roughly painted with dye solution. The same experiments are below with another layer of dye. Conclusion - it is hard to apply exactly where you want it, but it does work as a resist on paper, didn't work so well on fabric.