The pearlescent white that Peugeot used in the 1980's tended to be very thin. It easily chipped off of the sharp edges of the lugs and "bleed" or stained rust. It's somewhat of a bear to clean it up too!
I bought a 1983 PSV-10 and it had that problem.
Lightly scraping the surface rust away and touching up the damage with some automotive touch-up paint can hide most of it. Once the components are on, the shinny parts distract the eye and the little defects become less noticeable.
The last picture shows the results.
It just has to pass the 10 foot test!
verktyg
Chas.