First off, welcome to the Forum!
Now here's what I think about Concours winners and show cars:
1. They're not gonna give away their secrets or they wouldn't win, now would they?
2. Those cars are likely trailer queens. So, the products they use are for VERY short-term shine purposes, not durability. Even if I knew exactly what they use, I probably wouldn't want to use it, because it's just not practical for daily drivers. If you've got a garage queen or show car, then there are VERY short lived products out there that will boost your shine for events and such.
3. Those cars likely have custom paint jobs that cost thousands of $$ and thousands of man hours to prep. Again, not practical for daily drivers or even most show cars.
So, it's just my opinion that what they use on their Concours cars really doesn't matter much to us daily driver types... they're in a whole 'nother world of paint care and the methods to achieve that at the Concours level.