Just wanting advice on the best way and product to keep my black powdercoated cases in top condition?
I've tried S100 Engine Brightener. It's not cheap at $13 for 4 ounces, but it did, kind of, freshen everything up, at least until it dried. I think it would be best used every time you wash your bike, if you can afford it.
S100's propaganda states:
Let's face it, heat and age are murder on your bike's engine. In time, your cases and cylinders look dull and grey. Ordinary products don't help as they can't take the heat. Here's a technical breakthrough that can. S100 engine brightener puts life back into these surfaces, making them look factory new again.
They even have a website: www.s100.com where you can download a sample to try