I love techno blue! Sweet lookin buggy you have there.
The gunk on the backup light would appear to be be a combination of oil/road grime/dirt build up. It's easy to get the housing out so you can clean it. The stuff on the wheels appears to be just everyday brake dust. It might take some elbow grease to get that off, but the results will be worth it.
It is a sweet lookin buggy though!
