prepairing a plastic fuel tank for postage

[PRITCH39]

Hi,

does any one know what needs to be done to send a fuel tank via aus post?

[matcho mick]

just wash/flush it out with detergent to get rid of the fuel smell,(if it's been sitting with no fuel for years,should be ok to send),

[VMX247]

No fuel and pack it. 
From 6225 Country West Aust - 2000 Sydney NewSouthWales
Rate $18 for weighted on it's own only.
Registered signed for $2.50

Post office worker:"Would you like me to put it in a bag to go"     
Me:"No thanks I'm going to pack my Alloy tank at home" 
Anyway I'm thinking under $30 via Aust Post.

My question is "Can I take it as hand luggage on the internal flight" ??
cheers A