Ben Nye's liquid powder hair colour is the professional answer to temporary hair colour. Shake well to mix then apply to hair with a brush (an old tooth brush works fine). By applying the liquid hair colour with a brush you can brush in the right amount to get the shade and effect you want, you will have much better control than with an aerosol spray that sprays everywhere. Various colours in the product may be mixed to lighten or darken a shade. Washes out with shampoo and water.