If you have never used this medium before it is wonderful when used for shells or butterflies or if you enjoy painting fairies, resulting in a shimmering effect in the light similar to Mother Of Pearl.Tips on using Iridescent Medium · Mix the medium thoroughly before use by shaking the bottle. · Add about half a teaspoon (or less) of the medium to your mixing surface. · Use it diluted with clean water directly onto your watercolour paper (where you require the mother of pearl look) and let this dry before painting over it. · Alternatively, mix a little of the medium with your paints on the mixing surface. · The effect is far greater when using transparent colours. I hope you enjoyed this months issue of Leisure Painter and were inspired to have a go.