Yeah I know....Like I said I still have a few thing to do to it......Addressing the rust is part of that.....I hate to put a damper on proceedings but after 40+ years of working with or being around metals I have yet to see orange 'rust' on alumin(i)um! It just doesn't happen.
You could have green or yellow showing for the zinc chromate primer or grey/white for the oxidized alumin(i)um but you would only ever see orange on iron or steel.