The students from Westlake Girls High School in Auckland had intended to target cars belonging to members of a rival school, but instead damaged cars owned neighbors, The New Zealand Herald said Sunday.

Sun-il Jun, a local 17-year-old who found his brother's car coated with the culinary mixture, said the girls' prank went too far.

"Have you ever tried to wash sun-baked egg stains off a car?" said Jun, who had been watching his brother's car at the time of the prank.

"It's difficult to clean and it also smells bad."

Nearly 25 female students took part in the prank to celebrate their dwindling days at school.

Westlake Principal Alison Gernhoefer told the Herald the girls and their parents should be financially responsible for all damages from this month's celebratory stunt.