Thanks Graham, that worked ok. Good tip, I have noticed the same problem on other sites.
The stripes are cut from solar trim. The black cabin outline is black solarfilm, which sticks very nicely to the foam board.
I built two Flite Test Simple Cubs. Very easy to build, and easily replaced if crashed. I would post a photo but every time I try the photo appears upside down. If someone can tell me how to sort the problem that would be good.