I haven’t but I bet it would be fine to improve appearance. However, it does not have a hardness rating like ceramic and graphene so future swirls and scratches would not be reduced. So, likely it will improve appearance and decrease washing efforts for a short time.
If you all are interested, though it’s not testing Maxl products, these videos might help in deciding on products that help improve appearance and protect our rigs. His testing methods are not lab grade but sound.
I’m biased toward diy ceramic. But it’s definitely a labor of love as it is a time intensive process compared to washing and waxing.