If I remember correctly he only found the damage when they started stripping it for paint (he was only spraying the bumpers and lower panels). Wasn't bad enough to affect the daily driving of the car but being structural, it may not have held up in an impact.
It bothered him that much he broke the car rather than risk putting anyone in danger.
Fairly certain it was drivers side chassis rail/strut mounting that was the issue but he can confirm next time he's on.