From: "Bill T." 
To: atm{at}shore.net
Reply-To: "Bill T." 


>From: Dean Ketelsen
>calcium carbonate powder on anything from dried polishing
>stains to water spots.

Car detailers use supermarket sodium bicarbonate powder to remove
waterspots from auto glass and mirrors.  Don't know if I'd want to try this
on a precision polished surface, however.

Can anybody compare the relative particle size and abrasive potential of
calcium carbonate versus sodium bicarbonate?

I recall discussions here about at least one company that wipes down
mirrors with dry Cerium Oxide powder prior to coating.

Bill T.


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