The *BEST* advice I can give is to buy them both! Much as *I* prefer SRP for a base under carnauba, I *WILL* say that if you have any hard-to-remove MG residue, the AIO will be MUCH better at removing it. If you DON'T have a problem with the MG, then I'D go with the SRP.
FWIW, I really wasn't kidding with the "buy them both". AIO is good stuff to have around for its trim-friendly cleaning abilities, while SRP is (*IMO*) more of a protection-oriented all-in-one product and a GREAT product for what you're planning.
