Righteo, so, given all of this knowledge, I'm assuming that you blokes (Curtain & 73 ) would have not departed Perth, or Diverted to an applicable Alternate?
Fair call, but what's your cut-off criteria for RF then?
Perhaps you have some applicable weather procedure or criteria to derive your Contaminated RWY no-go from the METAR alone?
I'm not trying to be recalcitrant, but if you have a workable method of ascertaining Contamination levels and braking action at uncontrolled Airports, please share.