Just made a few phone calls to some panel beaters. The impression I get from speaking to a few of them is it is a fiddly bit of work they'd probably only do as a love job HOWEVER one lovely lass suggested I contact a motorcyle panel beater. Of course! (Smacks head.) It's obvious after someone tells you. Who better to spray a frame than a bike mob.
Anyway the washup is around about $150 if I pull it apart and strip it myself which according to the rotorburn boys is the easiest bit.
The $150 is for a 2-pac finish the same as that which goes on a car or motorbike.
Next question I suppose is, is a 2-pac finish ok for a MTB frame??
Looks like I have a new project! Never pulled apart a duallie before so look forward to some more gumby questions.