Sorry if you're already aware of this, but there are waterslide decal sheets that work with your printer -- even white background ones. These should work for the dark colored areas.
I do realize this one is old news as well as a fan-created custom, but is anyone selling kits for this?
Throne Eins Turbulenz
Also, the Kyrios Gust interests me.
Painful. I hope I never see one of these in person. Of course, with the price tags I've seen on the internet, the nice thing is most of us won't ever have to see this on the street.
I dealt with this issue, too; however, I cannot recall what glue I used. I no longer have the tube, because the contents dried out on me. Also, I used a pin.