I can help you out with that! I have gone ahead and collected over twenty tutorials to make your coloring even better. They are a mixed grab bag of coloring gems, sorted by the type of art supplies used. That should help you narrow down your range of options, or see what potential other media hold.
How to Paint Tint? Follow the basic crayon tinting instructions for transferring. If you are using acrylic or other opaque paints, they will cover any lines within Place your fabric in a hoop as you would for embroidery. It acts as a stretched canvas would.