Would you believe... Lemon Pledge??? I use it on everything... paint, plastic, and windshield!!! Really softens up those bugs! They come right off and my windshield is amazingly scratch free. Also use it on the rims and it is pretty good at removing road grime. I use the blue automotive paper towels and make sure I only use a nice clean one on the windshield. So far, so good.
One of the reasons I chose the NT was it's lack of chrome and shiny stuff. I decided early on that I didn't want to spend a lot of time polishing a motorcycle.
On a side note, at a recent NT get-together, I was happy to see I wasn't the only one with ugly pipes. Everybody's pipes were brown, stained and ugly! However, I recently found what works for me to clean them up.... Scotch-Brite pads. Not the green one, not the blue one, but the brown one has just the right amount of abrasion without scratching. Although I have to admit I was a bit freaked out when the pipes came out a shiny silver. I had never seen them like that. Usually they have that bronze(?) tint. However, after a 400 mile ride, they were shiny and bronze tinted once again!