Step 1: Cutting your graphic onto your vinyl
If you don't happen to be so privileged you can draw out your graphic on your vinyl with a sharpie and then cut gently with an x-acto so the backing stays intact. I use a number 16 but I'm sure the typical 11 would also work.
I got a 10yd roll of white vinyl form signwarehouse.com (http://www.signwarehouse.com/c-VAVA4O1510.html) I'm not an expert in the different types of vinyl but this stuff works for me.
Step 2: Weed
If you're hoping to have the actual graphic part burn then you should remove all the vinyl around what you drew. (example below)
If you're hard core like my friend you can remove the graphic so that everything else burns leaving a white image. (see step 4-10)
Step 3: Application Tape
place your application tape sticky side up and then put your weeded vinyl sticker face down on top. Press from the center out evenly so that there are no air bubbles. Finally cut excess tape off.
Now you're ready to apply your vinyl sticker.
(The sticker shown is the type you'll want to use if you're trying to maintain a healthy body without skin cancer. The type shown later in this instructable is the painful inverse of this. )
Step 4: Apply the stencil
WARNING: By spraying the graphic itself instead of the area around it, all your skin will burn leaving you incredibly uncomfortable with the risk of skin cancer. Please do the inverse of this shown in the previous step.
Step 5: Peel away
Step 6: Cover up
If you're doing the opposite type of burn which only burns the graphic part you don't have to worry about covering up
Step 7: Spray
Step 8: Remove the vinyl
When you're done you should see a slight reflection where the sunscreen was sprayed.
Step 9: Wait and sleep on it
If you don't see a satisfactory image by the end of the day don't be discouraged. My friend was completely disappointed only to see the top part of the 09 by the end of the day.