After peeling off a bit of masking, you can see the difference, and it is profound.
I removed the remainder of the masking, and used the toothbrush and toothpaste method as described in the newsletter on the left 2/3 of the door.
I'm not sure if it was the water or what, but the portion that had been cleaned with the WD-40 lost its lustre, and seems to have reverted to its previous state.
On the leftmost third, I then applied the Wipe New. I think the results speak for themselves.