Hmmm, so worth using the Dynomat stuff about the speakers, and maybe some thicker stuff for the usual areas around the wheel arches etc?
Might just start off with the doors and see what I get from that.
Yea obviously front doors are complicated because of the windows up n down.. Rear end is straight forward as there is not much back there, and just pack out the 2 skins. I would probably use more dynamat in the front doors, the door skin is big on a 2 door and that's where you will hear the din from the metal moving on the outer skin.
You could if you want to do it proper like, remove door card and buy that mixed fibre material as well as a good sized square bit of dynamat behind the speaker area and:
-Degrease the whole metal surface first with a tub of methylated spirits, helps the dynamat and other stuff stick better
-Heat the dynamat to help it move and adhea better
-Stick a larger then normal square or oval shape dynamat on the door skin behind the front speaker location, that will really help
-Then get some contact adhesive and 1 inch thick mixed fibre roll, cut out a door skin template
-Spray the door skin inside, spray the template and apply
-You can always cut the template down into smaller strips, makes application easier, and go along in sections. That way the door has good insulation and does not have that tin sound when you tap it.
You will hear the difference if you wrapped a knuckle on the door after application on the front door and then on the rear quarter panel further up, right in the middle where the panel will move the most, the front door will sound more, solid, dense.