Hi all...
I have a 2008 G35x with the twin intakes. We purchased it around 2010 and I've been doing most of the work on it. It started out silver but my son and I've wrapped it in Avery metallic blue.
It's beginning to have rust issues on the underside but no holes yet.
I hope to use this site for help in keeping this car running a bit longer.
Jeff

 

There's a few underside components that are notorious for rusting, the front and rear subframe braces are the biggest culprits. Fortunately they are fairly easily removed and replaced. If those are the components you're having issues with I strongly recommend painting the donor replacements with something like Rustoleum undercarriage spray, it's pretty flexible and won't crack like paint will.