The owner suspected he knew who the culprits were, and police were involved.
Walking in and seeing the chaos last week, he could only describe his feelings at the time as "shock".
"You can't explain it very good," he said.
"We just went out for dinner about 8 o'clock for about a couple of hours. When we came back it was just destroyed."
He wanted to thank everybody who supported them and helped with the cleaning after Friday's incident, and the community for helping.
Whanganui Police prevention manager Senior Sergeant Andrew McDonald said there was an ongoing investigation into the incidents and police were working with the owners "to try to prevent anything like this from happening again".