I've used it on hundreds of cameras (lettering too). The only instances of lettering being harmed was when it was already loose or flaking (the cleaning simply rubbed some more off). It was certainly not dissolved by the lighter fluid. ----- Original Message ---- From: David Simms <simmszee@xxxxxxxx> To: leicareflex@xxxxxxxxxxxxx Sent: Sat, January 16, 2010 6:51:11 PM Subject: [LRflex] Re: formula for lens cleaning fluid Hmmmm. Is it capable of cleaning the lettering, for instance on a Leica lens ? I think I'd find myself being somewhat squeamish about using it on optical surfaces although the (possible) Leica-sanctioned mixture that I mentioned would probably not be much less nasty. Thanks Dave ________________________________ From: Chris L <speleo_karst@xxxxxxxxx> To: leicareflex@xxxxxxxxxxxxx Sent: Sat, January 16, 2010 9:42:12 AM Subject: [LRflex] Re: formula for lens cleaning fluid For a few years I was buying, fixing up if necessary, trying out and then selling classic cameras. I've used lighter fluid on practically all of them (lenses, bodies and mechanisms) without any adverse effects. ------ Unsubscribe or change to/from Digest Mode at: http://www.lrflex.furnfeather.net/ Archives are at: //www.freelists.org/archives/leicareflex/