Since it is not too hard to come up with letters and numbers I always find my small air force ideas grounded for lack of 1/72 or 1/48 scale markings. Of course masking and painting present possibilities. But not all markings are easily rendered by simple masking. ( Not that masking a roundel for example is that easy).
I am open to sources of small air force marking of all time periods.
Sincerely,
AC