Is this rotor housing done?

[BLKTOPTRVL]

Originally Posted by Ender

If you divide the housing vertically, exhaust/intake on one side and the compression/ignition on the other, it looks like a lot of chatter on the exhaust/intake side. Try acetone to clean them up. Pros use it, I've used it; it seems to work well.

So, you think the burning is on top of the chrome plating and not a sign of the plating being worn off?

Off to the store I go.