Technical Technical paint question

I am working on an OT car, getting it ready to sell.
It needed paint repairs in some areas and am just going to spray what's needed, and clear the whole car.
It was painted by me about 15 years ago.
Currently, I did all my repair bodywork, and got the primer sprayed. I blocked the primer, and wet sanded it with 400, but blew through the primer on some edges, or went through to my body filler in small spots.
So my question is... What should I do now?
Should I just spray some etching primer on the bare spots, and spray sealer over the entire repair area, let it dry, and scuff it down?
Should I block it back with 220, then basically reprime it all?
Or should I just get it ready for color, and spray sealer just before the base goes down?

Oh. It's probably worth mentioning that I used Nason 2k urethane primer on it.
Really... Any help with this one would be great, guys.

 

Some relevant discussion hopefully: http://www.hotrodders.com/forum/sanding-grit-2k-primer-befor-epoxy-214414.html
Seems your question comes down to, will the non-etch primer bond to the revealed metal surfaces?

 

First off... Thanks for replying!
And that's exactly what I was questioning.
I know I'm selling the car, but I don't want to butcher it.
I'll check out the link you gave.

 

I would spot prime then scuff again and seal and paint but if I went through on the rescuff I would know there was more work.

 

Thanks saltflats. That's kinda what I was leaning towards doing.

 

If the breakthroughs were only to bare metal, I would say just spot seal the bare spots. Sealer over filler breakthroughs show through (ghost), so I would spot prime those and sand accordingly, then seal where necessary.

 

Very cool.
Thanks for the replies. Looks like I got a bit of work to do this weekend.