Yeah, winter has my car looking light gray right now. By the time I took that pic I had driven the car for about 15 minutes on snowy roads.
I don't know about the benefit of AIO but I would do it. It says on the bottle that if the finish is new and not oxidized you can skip the AIO and use SG but I will use AIO anyways.
Counting down till spring when I can do:
Dawn->Clay->IP->FP->AIO->SG->S100
Thanks for the positive comments, I look at my car now in the garage and it is covered in salt. These pictures take me back to a happier time...