Need advice with Sublime color issue

[70chall440]

As the title says, I need some guidance, advice, etc on an issue I am experiencing with the paint on my Cuda. I painted this car last summer and have yet to assemble it. I worked hard to get it painted and went through a lot of trials and tribulations. Suffice to say I got it done, then somewhere along the way I had an issue when a piece of metal I was grinding skipped across the right rear quarter leaving 3 nicks. A few weeks ago I set about fixing the damage and got it leaved out, scuffed up and then went on to spray it. Upon cutting and buffing I noticed a line on the sail panel, I wet sanded it and buffed it repeatedly and eventually got to the point in the picture which is there is a transition where the paint is lighter (first paint job) and darker (repaired area).

So after a lot of thought I have reached the conclusion that I am probably going to have to reshoot the car to get it evened out but before I do I wanted to come here and get some more opinions. So the "ask" here is this;

1. is there anyway to fix (without respraying the whole car) what I have going on now, if so what?
2. if there isn't anyway to fix it and I have to respray it;
   a. can I scuff the existing paint and shoot over it? (I am not concerned about the final color, only that it is uniform)
   b. do I need to reprime the car before respraying it?

While this sucks, the car is still essentially "ready for paint" in that it is not assembled. I do have the AAR blackout on it which I will have to mask but other than that, I just need to mask the car and go.

I appreciate any relevant assistance/advice given

[plumcrazzy]

No need to reprime.
You can try blending the paint a little by flowing lighter and lighter coats further and further away from the original coats.
If you decide to recoat for uniformity make sure you scuff to a dull finish all over and use the same type topcoat that the car has now and I would suggest using the same brand as well for compatability.
Just my thoughts from experience---easier to say than accomplish though.
Good luck.

[70chall440]

Appreciate the input. I will be using the same brand and type of paint. I think I am better off just to reshoot the entire car rather than try and blend in just that area.

[larry4406]

No expert here but any chance it is related to the quarter to roof seam? 

I've read that painted roof cars had leaded seams and vinyl top cars had "bondo" seams.  I have read that welding a patch over the seam can result in telegraph of the seam thru the finished paint.  Not sure how yours was finished.

[70chall440]

No expert here but any chance it is related to the quarter to roof seam? 

I've read that painted roof cars had leaded seams and vinyl top cars had "bondo" seams.  I have read that welding a patch over the seam can result in telegraph of the seam thru the finished paint.  Not sure how yours was finished.

It absolutely has nothing to do with that, the quarter seam is completely welded, filled and then a little body filler over the top (no lead at all). I know what caused it, just am not sure if it could be corrected. I have resigned myself to repainting the entire car (except the black out areas).