Thanks for all the advice. Used Vuplex and cleaned them up really well. Now I can see the scratches clearly.
Now that I have a good cleaner, can anyone recommend a scratch remover. I was looking at the Novus product sand Plastx from Meguiars. Last thing I want is to be sanding something and having to replace it due to lack of ability. I do keep a cover on the plane as a hangar at YBAF is dearer than a penthouse in the city !