I'm new to the hobby so forgive me if I don't know all the lingo. =)
But...I think I may actually have what you're talking about. It's funny because I was trying to come up with the words to describe it to ask what it was and I couldn't come up with any. But "plating" nails it on the head. Assuming of course we are talking about the same stuff.
What I have is pinkish purplish in color and it looks like plates as it stacks up on the LR. I didn't do anything to get it, I guess I was just lucky. I'll try to get a pic of it tonight to throw up here to see if we're on the same page but if you have a pic handy of what you're looking for post that as well so I can compare them.