The paint on my UC is nothing spectacular. The saddle bags have a slight "orange peel" feel to the lids. I think the MOCO rushed the job, so I don't spend too much time worrying about it, most want their ride to look as nice as possible and to maintain the paint well.
I like the clay bar for smoothing out a finish, and I have used Mother's and Meguire's paint cleaning, glazing and waxing systems to help remove scratches and polish. For removing scratches and swirls I think the work well and are comparable. My neighbor uses these on his show car and has been for years and he has won a few awards, so I would guess they are pretty good products. The spots that get burnished from the seat on the tank: I polished and added some of the clear protective tape, since you can't see it anyway.
Whatever product you use, I think the most obvious and constant attack on everything on your scoot is UV from the sun. Vehicle paints are pretty amazing at resisting but eventually begin to oxidize from UV, but the plastics, vinyl, leather, rubber take a hard beating. I stand by Aerospace 303 Protectant after a good detailing and I wipe the seat and plastics down with it weekly. It does leave some streaks on paint if you use too much, just like Pledge can do as well. Aside form what the manufacuter of 303 will tell you, I did my own little study on a vinyl grill cover in full sun for a year and on the fiberglass stern of a gel coated sail boat that sat in the water, in full sun for a summer. Tremendous difference.