Torch it smooth

I had heard about using Meguiars Ultimate Black on a faded air box like on the CB750. I used it and it helped, but I had a lot of fading showing still. Plus after sanding 320-600 grit, it left a faded area. I decided to try to use a cigarette lighter to see if I could help refinish it. It worked but was slow. I then got more brazen and used a torch and it worked fantastic. You have to work fast but you can watch the surface change as it creates a slightly molten top layer. After it cools, use Meguiars again and it almost looks new. Depending on how crazy you are you can sand out all the scratches and then give it a like-new finish.