Re: ATM Progress on the 13.1" x 7/8" mirror

["Bill Prewitt" <bprewitt@neo.rr.com>]

I'd go back to 25, then stop at 9
Do this as one continuous session - no overnight breaks.

If you just start polishing as-is, the scratches will be there when you get it
aluminized.
You'll never see them at the eyepiece, though.
             Bill Prewitt

My webpage of telescope making and caving
http://home.neo.rr.com/imaging

>    Sadly, when I was done with the last (5 micron) grit I
> discovered 3 straight line scratches, all ~ 1.25" long, at the outer
> perimeter, (where I presume they will hurt the most optically) and.
> These were not present at 9 micron.


.  What are the odds
> that polishing will remove these?
>