Re: ATM What does a "super polished" surface look like?

["Bill T." <twentiethwave@hotmail.com>]

Thomas Janstrom wrote:
> Actually I use a 1/3 W with between 10 and 14 tangents (fast with lots of
> pressure) per rep. One rep being from one side of the mirror to the other
> and back. This gives me a ghostly smooth surface that is also a sphere!
and
> for the last couple of mirrors no edge defects, this may just be luck
> though;])

I like lots of tangents, too.  Also minimizes digging a highly localized
hole in the center with small tools.

But the magic I was actually asking about was some overall neutral stroke
that could be applied to an existing parabola for smoothing purposes,
without altering the shape of the parabola.  I'm skeptical, but I know
professionals who claim this is possible.  Any "overall" stroke I can think
of will surely take down the parabola, even ones that try to get tricky over
the 70% zone.

Bill T.