I remember an older Jag document approving some selected autoglym products, but in the context that these were approved and thus would not create warranty issues. Unfortunately that was not one of the docs I downloaded.
So I guess they have an approval process and a poor choice could affect warranty.
Maybe one of you can set me straight. I have been rubbing waxes, sealants, polishes, quick detailers, and a host of other products on cars for a lot of years and I must admit that I just wish I understood how and why they do what they do. I have found over the years that being anal about keeping a car's exterior generally did more harm than good. What I mean is that being overzealous with the rubbing of these products on a cars exterior can over time create the very problems you are trying to prevent. I now wax my vehicles only twice a year, but I do wash them frequently. I have always wondered exactly how and why waxes and polishes will provide for a "shine" on a vehicles exterior. I also wonder just how much difference (in end result) is there in the "premium" wax products? I know many car guys have their own favorites and I get that, but sometimes it is hard for me to see a difference (when I am at a car meet) between cars I know had different products used on them. I guess I would also ask you all; How did you come to your selection of exterior care products? I would also ask about the newer synthetic waxes. Are they more durable, and / or is the shine they produce better than, or about the same as, Carnauba based products?
I have a test for all of you. What I would ask you to do is get a thin walled sandwich bag, insert several fingers into it, then lightly move it across the surface of your car fender, door, or wherever. What do you feel? How smooth does it feel?