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Gez
Tinkerer
Username: Gez

Post Number: 133
Registered: 09-2007

Rating: N/A
Votes: 0

Posted on Saturday, August 15, 2009 - 03:13 am:   

I guess the degraded foam around the eyepiece has caused 2 'desilvering' spots to appear??
It is best to just remove the foam and gently clean any contamination from the protective black paint. Don't be too enthusiastic as you may accidentally remove some of the aluminium coating that is still attached to the glass. Once the corroded aluminium has been removed he spots will not be so visible when looking through the viewfinder.
I have attempted cover similar spots with kitchen foil (bright surface downwards) glued in place with glass cement. The results have been OK but not brilliant.
The best solution is the vacuum deposition of a fresh coat of aluminium. I guess you are in the States, but a firm in London will do the job for 15GBP. However, for my next recoating job I'm going to approach a local mirror manufacturer, he should be able to recoat in silver for a lot less.

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