303 Protectent is Good stuff
I just used it for the first time last night. I ordered it from autogeek based on recommendations here. I was already ordering another bottle of Klasse All in one cleaner/polish. So it was a no-brainer.
My NT had several plastic pieces fading, the 303 Protectent made them look better than the day I bought the bike. I am serious, they now have this lustrous sheen that isn't as shiny as painted plastics but makes it look much better. I like that it is equivalent to SPF40 and provides on-going protection. Easy enough to apply that even if it needs it 3 or 4 times a year I can do the entire plastics on the bike in 20 min taking my sweet time. To really do a good job I would take off the plastic pieces, then sat in a comfy chair. Sprayed a little 303P on a microfiber towel and gently and thoroughly rubbed it in. Lastly, just rub it off with another clean and dry microfiber towel until the plastic piece is dry. All the plastic pieces that were fading on mine are very easy to remove.
So after a wash, 303 protectent on black plastics, and Klasse AIO on painted surfaces my NT looks amazing. I did take a photo showing one half of the black plastic side piece treated with 303 protectant. I can't post it now since I don't have the photos handy, but I will try and post the photos soon.