On Thu, 20 Mar 2008 10:35:13 -0500, Jeff Wisnia
wrote:

That's why I commented about a metal snake run through the toilet
scratching the bottom of the bowl. There are some grey scatches inside
that toilet now which won't scrub off, even with a Brillo pad.

Jeff,

Have you tried Bon Ami Cleaning Powder /Comet/Ajax to see if it will
remove the marks? Remove the water, then scrub with damp powder.

Some kitchen pans will leave metal on the sink, occasionally. It
cleans up with the powder cleaners.

Not a suggestion, but I might even try Muriactic acid and see it
helped. Maybe a half cup poured into the bowl.