I have had to deal with the same crest work on my build of the USS Brooklyn 1/96th scale, used the computer image editor to get pics adjusted to the correct size,flipped one image so both port and starboard sides were created.. printed images were placed side by side on cardstock, taped a small thin piece of plex(lexan or whatever clear) I could the work the fimo type clay directly above them images, when complete mold material was poured over and crest were able to cast them in resin, the center section was modeled in fimo also(but I had an extra bow section from a hull that wasnt worth finishing)a mold was made from this also, a craft store fake gold leaf kit was used to finish the cast parts,, the crest look good, but still thinking about using some thickened epoxy and small syringes modified as micro cake decorating tools to make a better master.. no pics of the process but if you find my brooklyn build on RC groups scaleboats pics are there(have to get back to work on detailing out the brook)