Yep, I got a bottle of some CeO to try out (sorry, but I don't have the bottle here but rather in the box at the Univ.) and it worked a bit more aggressivly than some. I don't know if the stuff is better but I did get 3 mirrors out of the bottle and some besides that. Bob May http://nav.to/bobmay bobmay@nethere.com NEW! http://bobmay.astronomy.net