I prefer this stuff to CapeCod [ame="http://www.amazon.com/Simichrome-Metal-Polish/dp/B00BSJYQ9S"]Amazon.com: Simichrome Metal Polish: Automotive@@AMEPARAM@@http://ecx.images-amazon.com/images/I/51qri4clOwL.@@AMEPARAM@@51qri4clOwL[/ame]
But I would just leave that scratch alone for now, I don't buff every little scratch right away from my watches, if I buff every time it gets one the case will lose it's shape in no time. I let it collect a bunch of marks and give it a good treatment once in a while, feels a lot better too.