I am looking for advice on restoring shine to the front hub (and other parts) of a 68 Raleigh Hercules. The front hub, headset, and spokes are a completely flat grey. Not even a hint of shine. At first I thought it was just a really heavy coating of dirt and dust, but this does not seem to be the case. I am a little confused about what has happened to the original finish. I assume these parts were once chrome plated? Other chrome parts of the bike (rims, fork cap, rear hub, etc) are still a beautiful shiny silver. I was going to try some simichrome polish but I want to make sure I am heading in the right direction. I dont want to accidentally make the finish even worse.