Everyone, thanks for the input. I did't realize that letting the Paint Sealant "cure" was beneficial. Perhaps I have been buffing it off too soon (within minutes).
I did start the process on the Airstream using the Paint Sealant and I also used some Buttery Wax in different areas. The Paint Sealant has more shine, seeming to "clean" better. The forecast is for rain most of the week here in PA so I will not have the opportunity to get the trailer finished but I should be able to see the results on the areas that I have completed.