John's first scan you'll want to print on clear paper. His second scan would be printed on white paper just for the mouth and nat. insignias.
Or you might paint the white parts and put a clear decal on top.
Be sure to pick paper compatible with your printer- inkjet or laser print.
You'll need a fix- I like Testor's decal bonder in a little spray can.
What I do is print the art on 8 1/2 x 11 that you run through the manual feed.
Then cut out a piece of decal paper the size of the decal sheet and tape it over the image on the paper print, putting tape along the leading edge only.
Run it through the manual feed again.
Let it dry for at least two or three days.
Spray bonder on it.
Let that dry for two or three days as well. I usually find one coat works.
You've created one big decal at this point, so trim each marking out as closely as you can to the image.
It will take a little experimenting to get the right paper type selected, the printing quality setting etc. but once you do write it down.
Bill