Re: Re[2]: ATM [Fwd: BOUNCE atm@shore.net: Non-member submission from ["R R" <wjkkr@hotmail.com>]]

["Chuck Hovatter" <charleshovatter@acelink.net>]

>> >> From: "R R" <wjkkr@hotmail.com>
>> >> To: atm@shore.net
>> >>
>> >> I have been given an 8" mirror that has been aluminized but probably
>> >> shouldn't have been.  The surface shows a large number of pits & some
>> >> scratches still (I understand aluminizing will bring this out). I do not
>> >> have the tool for the mirror.  The mirror seems to be able to form a
>> >> decent image at focus, although I have not Focault tested it.  The
>> >> question is, should I either try to remove the aluminum coating,
>> >> repolish & with what, or pitch the mirror, or mount??
>>
>>
>> What pleases you?   Does it give a good image?   If not then you will most
>> likely have to go back to grinding - 120-220 grit if you don't have the tool.
>> You can make a plaster tool with tiles; the archives are full of them.   No
>> need
>> to remove the coating; It will come off when you work the mirror.
>> Good luck,
>> -Chuck
>
>Hi
> No, wait, Wait! A few minor pits and scratches are almost
>always present. Most recomemend using a black marker to
>dot the pits. I'm not sure this would be as good for the
>scratches. Unless there is troubles with off axis glare,
>I'd just leave them. Coating a mirror will bring out any
>surface flaws that were hard to see when just polished.
>Check it with a tester first, if it is good, it would
>need a lot of flaws to convince me to regrind. If the
>scratches were small, just making a lap and polishing
>might be in order if the figure was off.
>Dwight


I do understand Dwight, but I think the man said that the pits were "large in
number". A few certainaly won't hurt.
-Chuck