
A nice instructable that shows you how to make your own stenciled t-shirt. I’ve done this, and for a first attempt, it wasn’t too bad. Didn’t use the freezer paper though, but will do next time. I used 3 colors, hence 3 stencils, but the acrylic paint would crack. Since then, I’ve bought a bottle of Liquitex Fabric Medium, which reduces the rigidity of the paint once it dries.
Also, if you’re applying paint on a dark shirt, you’ll need to do a light base coat or apply several layers. Your mileage may vary as each paint/color has its own opacity and pigment concentration.
This technique is not limited to T-shirts to let your imagination run wild!
How to Stencil a T-shirt with Freezer Paper [link]