Dukenrock, I own a marine detailing business and even though I have never heard of Ziebart's diamond gloss, I would have to say that you are paying alot of money for snake oil. There are enough teflon based polymer sealers out there to make your head spin. They all work very well but there is no miracle cure out there. I think you paid an awful lot of money to basicly get a typical automotive detailing job. You should not have paid more than 225.00 for what you had done. Many years ago when I was in high school I detailed cars for a new car dealer in my area and we applied the Rusty Jones gloss treatments to new cars. They were nothing more than a typical buff and wax that people overpaid for.
You don't have to take my word for it, do a simple test that I have done for many of the miracle products out there.
Apply part of your deck or hood with one product the other part of the deck or hood with another and see if there is any real difference.
Feel free to give me a call and I'll try to clear up any questions you may have.
262 820 0782