I just painted my 67 dart flat black with Delfleet flat black by PPG. I painted it once with sherwin-williams basecoat black and was not happy with the shine so i repainted it flat black. My problem is that the paint turned out to be very uneven with spots that are alot shiner than others. It looks like there is more paint on these spots than the rest. The texture of the paint is cosistent along the whole car and it doesnt feel rough like it is overspray What could have caused this? too much paint or too close to the car? Is there anything i can do to even out the color? I am willing to try anything before i am forced to repaint it a third time. Thanks alot.

Pain in the rear, I know, but the last time I painted a flat black, I got glossy spots like that too. Turned out I applied too much paint in those areas, and somehow that caused it to come out glossy instead of flat. I repainted again but made sure to give a thin, even coat and that time the flat came out consistant. Maybe others with more experience can chime in.

Flat, or even matte,semi flat, satin, semi gloss paints CAN be very application dependant--much more so than the usual gloss. You are finding this out. As Daytona stated the evenness of each coat is really important, but so is the condition of the substrate. Uneveness in substrate--like an area of filler next to an area of paint can produce the unevenness you describe.
The only fix, short of another coat, is to abrade/polish the surface with a cutting compound, rubbing or polishing. The problem is that since you're starting with FLAT, and I assume you desire the car to be FLAT, in all likely hood you will be polishing the surface to some degree and 'adding' gloss. You can test in an inconspicuous area...but then again what do you have to loose?

That was what one of the guys at work told me too that i must have had too much paint in those spots.
What kind of cutting polish should i use? Fine? Medium? Coarse? Any ideas would help

Start with coarse first, since you can always advance finer, and coarse will add less gloss--it all comes down to how well is evens out the surface and what you consider acceptable.

I tried polishing the paint and it turned out worse than the rest of the paint. What if i wet sand it with 3000 or 4000 and leave it would that work? Any more ideas?

You might be up against a situation wherby you will never get acceptable results without applying more paint. Yes, you could certainly try wet sanding, and that may even it out to your satisfaction.

I would say at this point the paint you used is pretty unforgiving in terms of application technique. Again, paints with flattening agents in them CAN be very application dependant.
You don't have anything to loose though, give the sandpaper a try.

Isn't the preferred method to use base/clear, and add flattener to the clear?

The flat black on my Charger looks like hell, and there is no way I'd re-do the car that way (I didn't paint it that way).