It just so happens that I am one of the guys that use the lexan glue.
What you want to do is go through a Magazine and find a pic that will fit on your car body, and one that you like.
Carefully cut the pic out with an exacto knife.
Get some Faskolor, Faskoat #40200. (it's glue that dries clear)
Get a hobby paint brush and paint the picture with the Faskoat, and stick it into place.
Then pick your favorite color to paint over the sticker and your done.
Tip: Put the picture where you want it because it sticks quick!!
Let the glue dry before you paint.
Try no to play with the picture after it's glued in place. The paper will be wet, and will rip easily.
Try it on an empty 2 litre soda bottle first.
Any other questions, just ask. Here is an example. I used the info booklet inside a video game, cut and stuck it to the body.
Good luck.