That makes sense.Thanks for the information.
Called the auto repair, they still said it was due to a bent dust shield. Not yet had time to go to the shop.
But before changing the rotor, there was no such noise.
The dust shields are thin aluminum - and it's easy to accidently bend one a small bit.
I have one on the Cougar that I bent just enough to make sound when doing the lower control arms on said Cougar ... that's on my list for this weekend.