Masking tape will take you a long way! METHOD: The garment should be washed and dry. Tape plastic inside the T-shirt to prevent paint from seeping through. Attach masking tape to the T-shirt where you want the stripes to be. Spray with Palett fabric spray - we worked with shades of blue, pink and turquoise. Preferably, hang up the T-shirt to make it easier to spray both the front and back. Let the paint dry and then fix with an iron for 3 minutes from the back. It is best to place an ironing cloth in between.