Thanks for the info. I'm looking at printing some ink jet style water slide decals (suitably sealed of course) but am concerned about how fade resistant the inks are.

Also, my roundels are going to be WWII early RAAF which is a big white center with a blue border.

Is there any special technique to putting large waterslide decals over a painted surface? I'm very familiar with plastic scale models and the requirement to put decals on a gloss surface to avoid silvering....and the use of decal softner (which shouldn't be necessary in this scale).