You can paint on fabric made of natural fibers using Dharma Fiber Reactive Dyes. These dyes come in many vibrant and rich colors and are permanent. In this Instructable, I will be mixing up a cold batch of Dharma Fiber Reactive Dyes and will be painting, well more like sponging, straight on to fabric. There are many ways to use these dyes, but this way is very easy and straight forward. I used this method to snazz up a no-sew t-shirt I was making. You can check out how to make one yourself here.