Thanks RAGIII.
SBS if anyone is interested.
Tamiya 6mm masking tape first for black part of cross. Surrounding areas then masked off around cross....

Yellow tape removed and black sprayed....

When fully dry, yellow tape reapplied and surrounding tape removed (leaving tape in place either side of background square). White is AB'd on....

Further masking applied to cover the brighter white outline to the cross. Off white is then sprayed on to colour the background 'square'....

Tape is then removed....

For the circular access panel under one of the wings, I raided my extensive photoetch spares box for a suitably sized 'hole' and used this to cut out a circle on a piece of masking tape....

Other square panels arealso masked off...

And sprayed. Extra work, but much better finish when airbrushed IMHO....

Gary