cosgig... yes, bubbling on paint means that there is rust or bondo that has absorbed water. however, you can't tell from looking at this kind of surface feature to what extent the underlying metal is damaged. pin holes in metal will create the same kind of bubbles if you put bondo over the holes then paint over that. so even though you might see bubbles, you cannot tell if the repair will be a relatively small area that can have a small metal patch welded on or if a much larger portion of body panel will have to be replaced. ALL cars older than 10 years will start to show some rust on the body. and a 52 year old Barracuda, Dart or Duster CERTAINLY will have rust on the body somewhere. the big difference is - is the rust a small area easy to repair or is the repair going to require a body panel remove and replace. THAT'S why you can't make assessments about this green Duster or ANY car just by looking at pictures. don't believe me, talk to a body man who does rust repair on a regular basis.