I didn't even own a cat..
I have a SRAM force caliper that the metal rubs when the caliper is squeezed together. You can see where the rubbing has occured. I took it apart to see if it is a bushing problem or if it can be rebuilt. Is it toast? I unfortnately don't know how the part of the pivot goes together (Washers and bearing fell out before I could catch it ). I will take the other caliper apart carefully to see how everything goes together. The levers don't look bent but it clearly rubs where the two levers meet. See photo: