This is for a cracked paint effect. The effect of old cracked oil paint can be achieved by applying a layer of crackle glaze between two layers of different coloured emulsion. The base coat is applied first, usually the darker of the two shades chosen. Allow to dry and then apply a coat of crackle glaze by brushing in one direction only, as a general rule the thicker the coat of crackle glaze the larger the cracks will be.
Make sure that the crackle glaze is completely dry before applying the second layer of emulsion on top using a heavily laden brush to do this. Then stand back and allow to dry so that the cracks can develop. Rendona lustre paints also work well as a base coat for this technique. In the picture shown of the bag and the boxes the bag has been painted using two coats of emulsion while the hexangular box was first painted in lustre paint and then a top coat of emulsion.