Don Stauffer
Don't forget white decal paper. The worst task is having to cut the decal out precisely to prevent the white outline, but that may still be easier than difficult masking to eliminate the white border.
Somebody here once posted a trick, might have been you Don. Create a border around the image, in the decal art thats the same as the overall background color. That makes precicely cutting it out a little easier. Probably easier said than done, but if it's Navy Blue or Olive Drab, could be...