When on a property, it becomes a legal issue to where responsibilities may lie. Such sits outside the Australian Consumer Law. As the community is unable to provide legal advice, it is suggested that you obtain your own legal advice to where responsibilities may lie, including that of your own and any which may be that of the owner/operator of the car wash or the other vehicle’s driver. This website may also contain information which is useful (noting that it isn’t an endorsement of the legal practice in question).
In relation to legal advice, @graholl has posted some useful information here:
Before pursuing legal advice, it is worth considering its costs of taking legal action compared to the total cost of any claims of damage which may occur as a result of the incident.
