Made this for my daughter, she loves zombies n skeletons, she also loves fluro/neon colours. Make sure you have a nice sharp blade in your craft knife. I apoogize for the lack of pictures...
Find an image and font you want and print it out.
Trace the print out onto contact paper/duraseal and cut out a stencil of it using the craft knife and glass cutting board. (Glass gives it more crisper cut)
Peel the backing off the duraseal and place however you want on the tee. Put the Cardboard in the tee so no paint can bleed through to the back.
Get your sponge brush and fabric paint and dab dab dab until its all covered. Dry using the hair dryer.
Apply another coat and dry with hair dryer again, if you can still see any bits you've missed, apply another coat and dry.
Slowly peel the contact paper off and give it another blast with the hair dryer.
Turn your tee inside out and put it on the ironing board or place a paper inside it. Iron directly on the back of the print, you might notice some fumes coming up, but thats fine, keep ironing for about 1-2 minutes. This is to heatset the image so it doesnt wash out :)
Go and rock your new Zombie tee :O