Lucky... lol I have my own technique that works very well, if you use the right tape.
-Draw out a design (flames for instance) on a piece of paper.
-flip the piece of paper over
-Put about 4 layers over top of the backside of the flames (dont cut them to fit, just lay em down on the back of the paper to cover the design).
-Next, flip the paper over, and cut out the flames, along with the tape.
-You will then have flames with tape on the back of them.
-Rip the flame (on the piece of paper) off along with 1 or 2 layers of tape so you can stick it on the body.
Theres your mask. I suggest using blue painters tape from home depot so the paint doesn't bleed through... I used regular masking tape and it bled really bad.