Step 1: Materials & Tools.
1) duct tape
2) acrylic paint
4) a sheet of paper
5) cutter knife
For this particular design that I chose you'll need all of the above and:
8) soft spot for the 80s
9) a coin
Step 2: Shirt & Design.
I chose a simple 3,5" computer disk, like I'm so cool.
Step 3: Stencil & Islands.
For the difficult parts (for example letters), draw them onto a pad with a pencil, so that you can stick a piece of duct tape over it and cut it out with your cutter knife (in case your duct tape isn't see-through, lay some duct tape out and draw directly on it!) If you don't have a cutter knife, a razorblade will do. If you're emo like me, you have plenty of them.
Step 4: Paint.
Scarcely put one layer of paint on it if you want it to look real oldschool. Two or more layers of paint will make your design look more even, but it'll get pretty thick when dry and rather disadventageous to wear.
Step 5: Wait & See.
When it's dry, you can softly rip the duct tape off. Patience is the word. At first it will look like there are duct tape remains, but they are really just small lines that will disappear soon.
You can wash the shirt either gently by hand or toss it in the machine if it has a program for fine clothing.
My next instructable will be about how to end the war in Iraq. It's probably going to be filed under "not liable".