Electroplating metals can be a challenge. Several years ago, I wanted to have a small stamped mild steel reflector for AG-1 bulbs chrome plated. It took a little more than that.
After the cleaning of the reflector in an acid bath to remove the stuff that was on it, they copper plated it first, then nickel plated it, base chrome plated it, and finally lustrous chrome plated it. To gain about one and one-half stops out of my AG-1 bulbs, I paid a lot of money for the work on this two inch diameter reflector.
This does show that metal working and metal finishing may be more involved than our original concepts of how it will work.