On my Butch Leal AWB project, it was necessary to make all of the decals. The white lettering was the toughest as each letter had to be cut out and trimmed. I spent hours on just getting the script "FLASH" cut, trimmed, and applied. If you can avoid it, I'd recommend it. I wouldn't want to tackle that element of the project again. I also had the ghost line problem too. My solution was more filling, sanding, sanding, sanding, and more sanding. You should see my forearms now! I look like Popeye!
Your body is looking really good! So good, it's almost a shame that it has to be covered with paint! I'm enjoying your build immensely!