Back to Black has worked wonders on the black plastic of several GT's, Burgman 650's and Silver Wings. If the plastic is really faded, you might need some elbow grease to work it in, but eventually it will look like new. On one old Silver Wing, Back to Black made a dramatic, "holy cow, is that the same bike?" difference.
I use Turtle Wax ICE Spray Wax for the fairings. Like-new in minutes. For rubber and vinyl (seat, floor mats, passenger rails), I use Mother's Vinyl-Leather-Rubber cleaner (not shown, red + black bottle shaped like Spray Wax). I keep my 2015 super clean. Riding it feels better that way.
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