With out seeing the car up close it's hard to define the problem. Like Hotrod said you may not have finished buffing it out. You may try a finishing compound . I am from some old times and used mostly one brand but today lots of great products out there.

If it was painted and moisture was trapped drive it till you can repaint it. You'll buff the paint off trying to get it out . You'll see a milky look deep inside.

Go to a local shop and see what they say . They will tell you something that may help you.