After a bit of a think I have come up with the following plan to try and repair the damage.
1/ give it a clear coat to seal in and protect the stencils which will need masking over.
2/ mask round the area and carefully sand back the damage.
3/ re-prime and re-spray the area.
The main problem is the roundels, if it was the standard RAF version it would be easy as I have several spares. Being an orange centre is a problem but I do have some orange paint so may see what I can do with that.
I may spray the orange straight onto the wing then carefully cut out the red centre of a standard roundel before applying to let the orange show through.
If anyone has any alternative plan please feel free to share
Cheers,
Geoff.