Carl, have you tried AIO plus Signature on your wife's car? If I remember correctly it is silver. I really like that combo. Actually AIO is great by itself or topped with anything I've ever seen.
Applied a second coat of Souveran paste wax using the PC. This time I was able to successfully clean the wheel wells by turning the tires as far as possible. Still was somewhat difficult to dress the wheel wells. Thanks for the suggestions.