what works?

[Ken Arms]

What should I use to clean Edlebrock heads? I tried some aluminum cleaner and a scrub brush, it helps but does not bring them back to that new look. They are not the polished version but getting very tarnished. I did see someone once that had a spray on rinse off solution that worked effortlessly although I think it was some type of acid that might attack the engine paint or what ever else it contacts. Ken