To: "John D. Upton" 
Cc: "ATM List" , owner-atm{at}shore.net, Robert Fifarek
        
From: Hugues.Laroche{at}ses-astra.com
Reply-To: Hugues.Laroche{at}ses-astra.com



Hello Robert,, John, and the gang :-)

>Another possibility is that the scratch may have been caused by a
>clump of polishing compound acting as a single hard particle.

I could add: when the lap acts hard, take care that no substantial amount
of dried polishing compound forms on the mirror.
I have done that once and the symptom has been an irrgular drag and a sound
thatis quite rougher (nothing like the velvet noise of polishing nor the
squeaking). I got scrathes near the edge... I guess it is the likely place
for polishing compound to dry :-(
Don't misunderstand me: it is normal that the drag in polishing gets very
intense, but it must keep regular. Mirrors are like women, they like it
strong, but not brutal ;-)

Happy polishing,

Hugues Laroche




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