Had another thought....if you could somehow copy comic image and print on decal transfer paper that might be easier to work with.
Sent from my SM-A520F using Tapatalk
Or collage what you want in AI or PhotoShop against the image of the gutar outline. You could then get that printed as a plan print by someone like Office works. one single layer to have to deal with.
FrankenLab Hand crafting guitars, because Death Rays are expensive.