I would say get some of the spray cans and put it on some scrap metal. If it looks like what you want go for it.
I am working on a driver, not show quality and tried the Rustolium and Krylon options on some test metal. I found that in my case cleaned up old chrome with minor pitting and slight rust looked better. There may have been a dull finish on the old chrome but to me somehow it looked right on the car.
