There's another way, and you can do it yourself for under ten bucks. Go to Ace hardware and get a bottle of Acid Magic. It was developed as a safer alternative to muriatic. I submerged a badly pitted 1939 Schwinn springer yoke in a jar of it. I've used it to take rust off in the past and it worked well, without causing damage or adding the rust film, like muriatic does. I only meant to leave the part in the acid overnight, to clean the pits out, but forgot about it. A week later, that chrome piece looked like the day it was forged. Not a speck of chrome on it and no damage. Of course, I didn't want it without chrome, but it looked so good. Someone paid me 5 bucks for it at a swap. It's handy stuff and comes in quarts. Test it out on a small plated part, you'll like it.