Greetings list,

I recently acquired a nice specimen of Gao showing some typical weathering. I 
was told the stone could be cleaned by soaking it in a weak solution of oxalic 
acid and demineralized water and then brushing it gently with a soft iron 
(brass) brush. Has anyone on the list had any experience with this procedure? I 
am a bit apprehensive about soaking a meteorite in water and was wondering what 
others thoughts are as to this process.

The individual who informed of this procedure was also a bit evasive about the 
the strength of the oxalic acid and did state that if too strong it would coat 
the specimen in a white substance that is not removable. A bit scary. Any 
thoughts?

thanx,
Steve

  
Steve Witt
IMCA #9020
http://imca.cc/


      
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