I'm considering applying for an upgrade in the international segment of my upcoming journey. I have economy from BNE - SYD, then SYD - CHC booked on one PNR. The international segment is less that 4 hours. If i get a successful upgrade will i be able to use the lounge in Brisbane as well, even though that segment would retain economy. I know one world lounge rule honours flights if within the same day if business class but the flight is less than four hours. Otherwise ill just use a lounge pass and stay economy. No status as yet but will hit gold after my outward journey. (double status credit offer)