Silvery scratch on lens

I got a lens with a silvery looking scratch on it which I suspect may be
just some metal rubbed off on it from banging around with other lenses.
Is there a way to buff that off or is that what a scratch looks like on
a coated lens? It has a purple/green coating. I tried rubbing pretty
hard with a piece of lens paper and eclipse sensor cleaning fluid. I
tried scratching at it with an exacto knife and it does feel like a
gouge, but it looks like silvery build-up.
Here's what it looks like:
http://www.edgehill.net/1/?SC=go.php&DIR=Misc/photography/scratch

Paul Furman

Re: silvery scratch on lens

OK thanks, so that is what a scratch looks like on coated glass.
--
Paul Furman
http://www.edgehill.net/1
Bay Natives
http://www.baynatives.com

Paul Furman

Re: silvery scratch on lens

"Paul Furman" <paul-@-edgehill.net> wrote
It looks like a gouge to me. It looks 'silvery' because it
reflects light as it has no-antireflection coating.
It will have close to -zero- effect on the pictures taken with the
lens. Some folks like to fill gouges with black ink or paint: put
a little bit of black paint on the tip of a toothpick and dot the
paint into the gouge.
--
Nicholas O. Lindan, Cleveland, Ohio
Darkroom Automation: F-Stop Timers, Enlarging Meters
http://www.nolindan.com/da/index.htm
n o lindan at ix dot netcom dot com

Nicholas O. Lindan

Re: silvery scratch on lens

If the metal is still on it. Try muriatic acid applied with a toothpick
exactly on the scratch. Follow by buffing with a snapped of paper stem
Q-Tip soaked in Eclipse. It'll get rid of the metal, but you will need to
hit the gouge with a black marker.
Rita

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