[meteorite-list] varnish on pallasites

[Michael Gilmer]

Adam beat me to it.  Avoid varnish and sealers like the plague.

My two cents (actual worth may vary) - completely remove all traces of
the varnish.  Put a proper polish on the specimen.  Then bake it in an
oven for several hours to help purge any residual moisture.  In my
experience, Seymchan is stable when prepared properly, so the varnish
was likely a measure of laziness (as Adam said), and not an attempt to
stabilize the specimen by sealing out moisture.

Every time I see a specimen with varnish or polyurethane on it, I cringe.

Best regards,

MikeG

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On 3/27/12, Adam Hupe <raremeteorites at yahoo.com> wrote:
> Do not use lacquer on meteorites, period!  In this day and age, dealers
> should know better. Any time I see it, I think "lacquer is for lazy people
> who do not want to take the time to polish properly."  There is no
> substitute for a good polish which reduces the surface area and repels
> moisture.  Lacquer traps moisture in the meteorite and hastens
> disintegration.  Just ask anybody who has owned a Lacquer covered Brenham!
> I had one completely fall apart and the only thing holding together was the
> lacquer finish. It held it together just long enough to make it to my
> trashcan.
>
> Happy Collecting,
>
> Adam
>
>
>
>
> ----- Original Message -----
> From: Marcin Cimala <marcin at meteoryt.net>
> To: meteorite-list at meteoritecentral.com
> Cc:
> Sent: Tuesday, March 27, 2012 8:35 AM
> Subject: [meteorite-list] varnish on pallasites
>
> Hello List
> Need help :-(
>
> I have beautifull big slice of Seymchan 1mm thin. I wanted to put it to new
> membrane frame toogether with my 2mm Brahin and 1mm Shirokovsky so I start
> clean them from oil using acetone.
> Unfotunatelly I didn't know that Seymchan was covered with very thin varnish
> layer. Acetona damaged varnish so I need to remove it. Now slice dont look
> nice as before becouse polishing is not same on whole surface, varnish make
> it look super polished.
>
> Im not fan of using such protections on any meteorite so I have no
> experience in this topic. I need sugestions how to put thin and clear
> varnish layer. I should use normal clear varnish in spray or something else
> ?
>
> Thanks
>
> -----[ MARCIN CIMALA ]-----[ I.M.C.A.#3667 ]-----
> http://www.Meteoryty.pl             marcin(at)meteoryty.pl
> http://www.PolandMET.com       marcin(at)polandmet.com
> http://www.Gao-Guenie.com      GSM: +48 (793) 567667
> --------[ Member of Polish Meteoritical Society ]--------
>
>
>
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