Oven cleaner will also remove the chrome, down to the bare plastic.
The active ingredient is lye, which is caustic to skin and other tissue, so it's a good idea to use it in a well-ventilated area, or outside, weather permitting, and to use gloves, like household cleaning gloves, to handle the parts while they're covered.
I use an old glass baking dish, place the items to be cleaned in the dish, and spray on the oven cleaner until the parts are covered. Wait a couple of minutes, and then take an old toothbrush and scrub away the foam and gunk. Rinse the parts with water, and repeat as necessary. It doesn't take too long for it to remove the thin layer of chrome plating.
Hope that helps!
Brad