Richard, Nick,
I spoke directly to the curator of large objects - a Mr John White - who gave the impression the aircraft's paint scheme had only been 'repaired' (for want of a better term) the once. My advice would be to contact John White at the AWM directly. His relevants are:
john.white@awm.gov.au
Alternatively (and depending upon who's paying the international phone call), you can call John, though for ease of contact I suggest calling the main office and asking to be put through to either John or the Large Objects curating section (both only available Mon-Fri) - depending upon who is available. The phone number is:
+61-2-6243-4211
There is also a research section at the AWM, though I'm not sure quite how much information they would have on the aircraft. It can be contacted through
info@awm.gov.au or on +61-2-6243-4315
As a lst resort, the AWM's postal address is
GPO Box 345
Canberra, ACT
Australia 2601
regards and good luck
Adam