Mel:
The problem is beyond me, but at least in the USA and Canada as well as in
France most techs will treat a woman the same as a man. It's best to deal
with a guy who is the owner, chain places could care less in most cases, you
are 'just a skirt' while to a guy who owns the place and has made the heavy
investment in equipment and training modern auto repair requires you are a
customer...be well aware your looks will be discussed and gee, tell me when
a guy goes to the beauty salon or such places the same is not true...
When I worked in a garage in the 70's we did have nudie calanders but only
in the back room. The owner was quite adament that all customers were to be
treated with respect.
If a shop owner has a different opinion today he would seem to lack the
inteligence required to repair modern automobiles.
OTOH you do live in OZ....