Portfolio 24 Pics and tips. Some tips on using Colour directly onto a stamp and mist it with water and stamp for a water colour effect or hit with your heat gun briefly, and stamp for a more intense colour. Use the crayons directly onto card and blend the colours with your fingers or a wet brush A wash of Twinkling H20s over the top of the crayon work looks quite yummy. Use an H20 water brush and pick up the colour off the crayon and paint the stamped image in.