I'm looking at photos I took in Iraq. Granted, 3 ACR painted out most of their markings. You can see this on the Meng Bradley decals as they did the same thing to those vehicles, and Meng based their decals on several different variants I sent.
The long and short of it is this:
Most of the data has been painted out. These photos show what remained. (further evidence that Imgur is still working as I'm uploading them now.)
Standard IFF panel onfo - no one is going to take the time to paint it out:

The ID number always remains somewhere on the vehicle. You can also see the tie down stencils:

Nothing on the front. You might discern the darker color they used to paint over the markings and stencil data:

This is the only other one, but as this is an A2 and not an A1, you don't even have to worry about it:

Again, most of those decals don't even appear neccessary.