Not really about miles and points, except that this is an award ticket.

I have an award ticket from Europe to Melbourne in August, in First, on CX. (I realize the leg from HKG through ADL to MEL is two-class, essentially Business and the class on the ticket says "U", but the miles paid for the award is based on First and I am in First on Europe to HKG and back if that matters.) It's a long trip, and I'm meeting people shortly after I deplane but before I get to a hotel.

Here's the question: Is there an "Arrivals" amenity at MEL that allows (gratis) showers for pax in my situation? If so, how do I access it?

If there is none, I may have to find something during the layover in HKG and hit the deodorant just before landing in MEL.

Thanks for any guidance.