So is Meguiar's Pro line yet we use it.
So is Menzerna line (actually, even "more", it is marketed to car manufacturers only) yet we use it.
So is 3M yet we use it.
Etc.
I don't understand the point?
I envy those that are able to make such requirement. For quite a number of rest of us out there that is not an option, for us choice is either do it in the sun or never have it polished. Therefore I do what man got to do and look for product that will be most tolerant to working in the sun. Will that be perfect use condition for any product? No, but I will take I can have when there is nothing else I can do. That's just me, just being practical when dealing with facts of life. If others can have what I can not good for them. In the meantime my car would still look better polished than not, even if I do polishing under the sun.