Be careful with that Castrol Super Clean.
We sold some to one of our installers who demo'd it on a blue service jack. He left it to soak for quite a while, but it DID bleach the color right out of it!
NAPA (Canada) has a "BodyPro" chemical line that includes one of the best degreasers that I've ever seen. One of our HD Truck fleet customers loved the stuff and bought it in 5 gallon pails.