You will find this is a Chevy/Ford or in the Synthetic/Dino conversation, where whatever someone is doing, is usually the best...
Now, let me tell you the best
All kidding aside. As I read the responses, you seem to be getting a mix between Gel Coat vs Full Body Paint. Though you said paint, be sure it is paint, as how you work to restore the finish is different between the two.
If it is full body paint, and depending upon how 'bad it is gone', you will may need to add more aggressive steps then this. But, assuming it is just a neglected clear coat over a full body paint, here is my recommended steps:
1) Wash top down with Dawn. (The alkaline removes/cuts all left of built up waxes, grease, and misc other unknown substances.)
2) Spot check around the coach, with appropriate 'more tuff' touch up cleaning. (Tar, bug and tar removal. Scuffs and more stubborn hard water/white roof marks - start with Magic Eraser, and work up as needed with rubbing compounds.) The goal here is to treat local bad spots as needed, getting them the best you can.
3) Sorry, but if you did lots of touch up, was the sides again with Dawn, and then do a final drying. (I usually watch for 100% good quality towel sells, and stock up on 'car and coach' dedicated drying towels.)
4) Again for lightly neglected clear coat only. Try some of the All-In-One products available. They light cut/clean the clear coat, and wax at the same time. Many available, TR3 is one, but all of the big wax companies have such a product. I personally have had good luck with all things Zaino. Internet sales only. Their AIO
Z-AIO All-in-one: Zaino Store
has done a good job on both my Bounders Gel Coat (it was medium bad on the neglect-ion scale when I first bought it.) And I've had to use it on a few of the lower panels of our Country Coach.
What's nice about this is you are only Wax On/Wax Off one time.
5) UV is the enemy. So even though many of the products include UV protection, I always take another 20 minutes to go over one more time with either Zaino ZCS (Very good on glass too, as it is like RainX on steroids.) Or, I also have and use Aerospace 303 too. (I have a floor swifter wan, and attached dedicated micro towels to it. Quick spray of a 4-5' wide side area, then up and down with the swifter/micro cloth. With Zaino ZCS just walk away Wax On, No Wax Off
! With Aerospace 303, I usually flip the micro towel over to cover the wet area of the cloth, and go over it just after having applied that one section. (Hard to explain, but play with the standard yellow micro fiber towels, and you will see how if you first set it up to have a wet surface, the cover the wet surface by just flipping the hanging loose portion over the wet side.) I can do our 40' sides with two cloths per side.)
OK - So say you have more neglected products, then you need to step up the aggressiveness of the cutting, with different levels of compounds. I also have a good selection of the 3M products. Their compounds come in different aggressiveness levels.
Also as mentioned, get a good quality orbital buffer. Rent one if you want. But be sure you have a good clean pad for application, and then removal too. I use four main pads with a Porter Cable 6" Orbital Buffer. I mark one as Compound. Another for wax. And then the other two are marked for Compound removing, and Wax Removing. (A bit anal, but it was a one time investment, and I've used these for several projects.)
Let the buffer do the work, pick and area to work with that is not as well seen, like down low on the rear bumpers of my coach, and learn/get a feel for how the buffer works.
And also, if you don't want to do all of this yourself, hire a professional (and do your research, and get a person that has the right years of experience). They will have all of the toys and goops to do what is needed.
Either yourself, or via a Professional Detailer - you now have a baseline to go forward with.
On going maintenance for us is to wash every with a good auto wash that complements your wax of choice. I also will then spay Wax as You Dry type products on to the wet surface before towel drying. I then go over with either Zaino ZCS or Aerospace 303.
Plastics and Tires are very well supported with Aerospace 303. The UV protection on the tires will add to their sidewall health.
Best of luck, and have fun, and be safe,