Hi Merv, (and anyone looking for custom powder coating).
I friend of mine does custom powder coating and recently did my wheel centres in a metalic gunmetal with a satin clear in powder.
He has a vast aray of different finishes (way more than whats used for pool fencing) and powder products and may have something suitable. Family run business through many generations with a massive amount of knowledge with powder coat.
Worth a call and his work is perfect.
Contact details below
Roberto's Custom Powder Pty Ltd > Morningside QLD | White Pages Australia