From: "Russell Jocoy" 
To: ronaldn{at}ptd.net, atm{at}shore.net
Reply-To: "Russell Jocoy" 






>From: "Ron Newman" 
>Reply-To: "Ron Newman" 
>To: 
>Subject: Re: ATM polishing aluminum
>Date: Fri, 14 Mar 2003 07:37:41 -0500
>
>
>Try Tripoli as well as rouge for aluminum. Both work well in vibratory
>tumblers for polishing aluminum parts, However is it good enough for a
>experimental mirror surface???
>
>Ron Newman
>www.focuser.com
>
>
> >Rouge should remove the black.
>
>
> >> A question for the metalworking guru's on the list.
> >> I am currently in the process of polishing (or attempting to) an
> >> aluminum mirror (it is an experiment/fetish) with cerium oxide.
> >> The surface is a smoother than with the 10micron grit when I finished
> >> grinding, BUT the surface of the aluminum is getting blacker each time
>I
> >> polish. Is this a case of it is always darkest just before dawn, or
>does
> >> cerium oxide react with aluminum? Is there a better polish for
>aluminum?
> >>
> >> George Anderson
> >> Montreal Canada
> >>
> >> Clear skies and good health
> >>
> >>
> >
> >
>
>
("atm{at}shore.net")

       George, I have polished aluminum to a mirror finish. You can use many
products to get to the
mirror image......, but you will never be able to control the heave and ho
of the characteristics (sp)
of this metal.  Telescope mirrors have moved to hard,  and more stable
materials such as glass.
     I have experimented with thin aluminun and flexing the center with a
bolt and a wing nut.
After alot of work , I was disappointed. If your think glass has a heat
/cold temperment, figure your
aluminum curve and watch the circus mirror move with any... temperature
change.. no control unless
you rig a constant temp/heater and you are spending way too much time and
cost. But if you have the
time.. and can come up with a stable reflection.. more power to you.....and
let me know of the process.
     Russ Jocoy...................
("atm{at}shore.net")

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