I would have a look in your yellow pages for brushing workshops. They will know their best students and top artists. You can get good negotiable prices and find someone who will do the type of art you want. Some will only do death metal stuff with skulls and the such, other will prefer only patterns and bubbles where as other will be good at a whole range of stuff and will do what ever you want.
I used to work with a bloke who did surfboards. I can't find his number though. He was really good and if he couldn't do it he would practice it over and over on sheets of board until he mastered it. Sheet steel, bones, water, lenses, bursts of light and real flames like nothing else. Awesome stuff.
Give different art places a ring and try evening workshops. Even if you have to ring out of Sydney to get a contact for in Sydney. I know another bloke in Newcastle but he only does Pinball machines. Will get my Bro-in-law to ask him for some Syd contacts for you.
Bronze.
Rathmines, Lake Macquarie, NSW.
Could ask down here on Hoxton P Rd at the numerous smash repairs.
They should Know someone who does this work.
We see a lot of Nissans, Hondas , etc that have the "art" around these parts, just dont
know where they get work done.
Regards,Glenn>