I just said in another post I don't use Turtle Wax products however I will eat my words and say the Turtle Wax tire Black that comes with the applicator sponge (about 6 bucks) is the shiniest, long lasting stuff I've used. The spray on stuff ends up on your car unless you run a rag around it and let it dry.
I actually think the TW nay be a bit too shiny for my taste but it does last a good 2-3 weeks.

Pat