Re: ATM How to remove coating from secondary?

["Bill Cotten" <billsas@worldnet.att.net>]

----- Original Message -----
From: "James W. Burrows" <burrjaw@halcyon.com>
>
> At 13:24 2001-06-03 -0700, Bill Cotten wrote:
>
> >Because it was handy we used a little nitric acid to remove the coating
but
> >it had no effect at all. Any idea how we can remove this coating? Thanks.
>
> I think it'll have to be removed mechanically - it's probably silicon
> dioxide, i.e., quartz.  Use a polishing pad and some rouge or CeO.

We thought about that but the quality of the secondary is still unknown to
us and we are afraid we might ruin it's figure if it's a good one.

> It can > be removed with (DANGEROUS!) chemicals, but there has also been
lots of
> warnings on the list about the bad stuff, what is it? - hydrofluoric acid.

Not going to mess with hydroflouric acid here. Nitric and muriatic is all
I'm brave enough for. Thanks.

Bill
>
>          -- Jim Burrows  phone 206.244.2933, fax .0294
>          --              mailto:burrjaw@halcyon.com
>          --              http://www.halcyon.com/burrjaw
>          -- Seattle      N47.47233, W122.36620 (WGS84)
>
>
>