Just kidding, I'm bored at work
I like Burt Munro's black shoe polish protocol. Guaranteed to help you set world records too.Armor all is bad for the rubber. I rub my tire (tread area only, not the sidewalls) with used motor oil. It gives the shine plus it has all the essentials to keep rubber supple and free from cracks.
Just make sure to replace the tire after every application.