My dad, who's 87, scratched up his car quite a lot getting in and out of
tight space in his apartment building's garage.

He had it refinished and a few days later some scratches reappeared,
although he doesn't remember hitting anything.
It's possible that he did but doesn't remember, that someone scraped his
car while it was parked in the garage, or that the refinishing job is
failing.

Because of the cheap price that my dad got, I think that the auto body
shop filled up the scratches with putty and painted over them.  A more
expensive estimate called for replacing the panel.  But I don't think my
father got the details before he said yes to the cheap price.

Is there a way that I can tell if the refinishing is failing?

Thanks.

Jane