I gave the TWPUG a try based on several of the recommendations here, not because I needed it but because, like many on here, I enjoy trying different products. All I have to say is, wow, that's not my fathers turtle wax anymore! My car is red and has UPP x3 and several applications of Natty's and I think it looks pretty good as is but the TWPUG really brightened it up. I'll have to wait and see about durability but I usually can't leave it alone long enough to find out how durable it is. I may play around with multiple coats or topping it like Bence suggested but it's pretty impressive just the way it is. Thanks for the info guys. :bigups