RE: [ATM] surface bubble - filling pits?

[Mark Holm <mdholm@telerama.com>]

If you have just broken into the top of the bubble, so that the angle of 
the glass where it intersects the surface is less than 90 degrees, there 
is a risk of  glass breaking off in fine grinding and causing 
scratches.  Might be best to take a piece of straight wire, or the butt 
end of a small drill bit and a paste of fine abrasive and grind into the 
bubble until the thin, unsupported edge of the bubble is ground away.  A 
little bigger hole is better than a smaller one that breaks off glass 
during fine grinding or polishing.

Mark Holm
mdholm@telerama.com
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