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Old 15-10-2008, 02:04 PM
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Quark (Trevor)
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Join Date: Apr 2008
Location: Broken Hill NSW Australia
Posts: 4,110
Washing a primary mirror.

Hi All,
I have held the opinion for a considerable time that washing a primary mirror was akin to an act of heresy. An act of someone with too much time on their hands.

Recently I discovered Mike's very well illustrated article on this subject in the "Projects & Articles section of IIS.

A friend ounce asked me how to do this and my advice to him was to go and mow his lawn and clean his car, maybe then this urge might pass. He was determined though, so went ahead and in his attempts to clean his mirror he managed to rub through the mirror coating in several places.

However, after reading Mike's article I must admit that I am beginning to waver and so I am seeking feedback from any forum members that did, in a moment of weakness, wash their mirrors. How successful was it and did they end up with any water marks?

Also wondered at the difference between distilled and demineralized water.

Regards
Trevor
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