I just laquered a car ive been working on for myself and have a few runs

I basically want to flat the current job and buff it which i think will sort it out but was wondering what the score would be with spraying over the current laquer coat?

If i just flatted it down (if their were no runs) so only a light flatting and then sprayed a new coat of laquer would the finish be like i had just sprayed the laquer on again a fresh i.e show no imperfections? or do i have to flat back to the colour coat and respray the laquer a fresh?

Cheers for any help!