Mate you're in Sydney, you're guaranteed to have damage to your car.
First week of getting my GT-R, front guard got scratched/dented by a retard in a shitty utility vehicle in Chatswood.
Rear bar damage, scratches and dents on guards/doors. It's bound to happen
Park next to a pillar, never park between jacked up cars or taxi looking cars.
Maybe invest in a motion activated dash cam (front and rear, expensive though).