The drain itself does not have any rust. It is the area surrounding it. I just read reviews for CLR on Amazon. It is 3.5 or 4 out of 5. So I am wondering if there is any alternative to get rid of rust.
In the past, I would use very fine sandpaper on rust in other places. But the rust around the drain seems to erode the material already, not on top of the surface.
Thanks again, coffee MM.