:welcome: to AGO! :welcome:
First, if you're close to another member you might be able to get some up close, and personal help. :dblthumb2:
As you can see in my avatar, I have a 06 G35 as well.
Oxidation isn't a problem for any DA. Although it's odd that you have it. May be some sort of solvent based product that got wiped/smeared on the area you are having problems with perhaps?
I'm thinking it may actually be some sort of airborne contamination that you picked up while driving, being as it's on only one side of the hood AND the A-pillars. :dunno:
All of the INFINITI paints are base/clear coat so that's the good news. The bad news is it's not the hardest paint out there. In fact, my red one is so darned soft it you friggin' LOOK at it funny it'll swirl!!!!!!!!!!!!!!
When you say "faint swirls" that makes me think how mine looks after I've spent 3 days buffing and sealing it then washed it ONCE. I've actually never seen a G35 with "faint swirls", moreover they are generally a swirled mess.
Now if you have a metallic color (which MOST are) they hide swirls better. :xyxthumbs:
So.... first I guess we talk about washing.
You are doing 2-bucket method, right?

If not, GET TWO BUCKETS.
(
And a clean, fresh, microfiber wash mitt.)
Paint decontamination. You ABSOLUTELY need to decon the paint. Be that a fine grade clay, or something along the lines of the rubber systems like Nanoskin, mitts, towels, etc.
Wash it good, really good. Then throw a light bit of soapy water on one surface at a time and go at it with your 'decon' system of choice. Honestly, the newer rubber based systems are pricy, but considering how long they last, and the FANTASTIC JOB they do, they are a bargain! (
Not to mention if you drop one you can just wash it off and keep using it, where if you drop clay it's instantly thrown in the trash.)
So once you've thoroughly decon'ed the thing and gone over it again with a good light wash/rinse you're ready.
If you have a DA like the Porter Cable or Griots Garage that's a start.
Get the 5" backing plate as that'll be large enough, yet either of the machines will handle them no problem. Plus.... the smaller 5½" pads are MUCH less expensive than the 6½" pads.:dblthumb2:
Next would be pads, you'll need Lake Country orange and white AT THE VERY LEAST, (and 3~4 of both). Wouldn't hurt to have black and blue as well.
You can start doing your "test sections" with an over the counter compound like Meguiar's Ultimate Compound and the white pad to see if that'll correct it where you want it. If not.... move to the orange pad. Afterwards you'll use the white pad (and then the blue one) with Ultimate Polish to finish it down.
I'm not so sure though that you'll get the correction that you need, (and the car deserves) with UC. :dunno:
Another alternative is Meguiar's 101 which will REALLY cut that paint well while not leaving it completely full of micromarring (if you're careful). For the timid it's not!
Easier to work with however would be Menzerna FG400 and then try a "TEST SECTION" (as mentioned above) with both pads to see which one does the job without doing too much. Working with FG400 is a breeze, and on hard paints it'll literally finish "LSP" (sealant) ready. (
Not so much on softer INFINITI paints, but it's darned close.)
After the FG400 you can go to the white or black pad and start working down SF4000 then switch to the blue pad primed with SF4000 and it'll REALLY pop!
From there, two choices. Grab either Menzerna Power Lock *or* Wolfgang Deep Gloss Paint Sealant 3.0. I've used both, WG is AMAZING! If you want to try one you can get locally, grab Meguiar's M21 2.0 as it's a great sealant in it's own right. I use it on more vehicles than the first two, (although WG is IMO a better sealant).
You CAN however top M21 2.0 with Meguiar's #26 Yellow Wax (liquid) which is also a sealant, AND will give you a depth and clarity that'll make you sit back and just go "HOOOLLLLEEEE Moses!!!!".
Again.... WELCOME to AGO!
