Thanks all, I had not come across Krylon over here but a quick search shows it is available from plenty of craft outlets so I'll give one of them a ring and try out both the UV protection and standard versions. I don't have access to a spray gun and can't find catalyzed polyurethane products in rattle cans.
I guess another thing which would at least slow the process down would be to make some protective covers for wings etc so the decal is only exposed when I'm actually out flying. I have to admit generally my models don't last long enough for it to become a problem
but this one has sneaked through somehow despite plenty of air time.
Frog juice. . . Well, that bought up some interesting websites when I typed it into Google.
Finally found what you were referring to, it looks really good. I presume I can use it to seal the decal prior to putting it in water or should I only use it as a top coat after applying the decal to the model?
Thanks again all.
TTFN
John.