I just bought a 2003 TT that was oxidized all over, not horrible but it had zero shine and was rough to the feel. I took 3M medium duty rubbing compound and an electric buffer and went over the entire trailer small sections at a time with water to keep it lubed up and not dry out too much then would wash everything off and go back with 3M marine wax and the thing looks brand new. Granted it was a ton of work and I could only do about 10 feet at a time before I needed a good long break as I'm over 50 and tire pretty easy but I got it done. I would do a section, then wax it so if I got to a point I had to wait a few days at least the area I did was complete. It took me about a week to do the whole thing including the first wash from the roof down. You will be supprised at how well it will look when done. I would suggest getting some of the product and just do a 2'x 2' area and see how it looks to get an idea. Also its a great time to look for areas of concern that may need caulking etc. Good luck.