My DIY hand painted bull skull shirt.
What you'll need is...
Paint (fabric paint would be the best, however i used a little bottle of acrylic paint since it wasn't going to be thick amounts applied)
A pattern to go by unless your wicked talented and freestyle one.
What I did was find a picture I liked and traced the outside of it onto the shirt. I then freehand shadowed and detailed the rest. It's not stiff to touch, like some paints leave fabric.
So as you can see it's pretty simple, turn a simple shirt, pretty.
Happy Crafting