Discussions

╳Discussions

Groups

Recent Images in Discussions

Techniques for CollectorsCleaning polishing compound from a Septarian nodule

28th Aug 2007 14:13 UTCJared Woodward

I just recently acquired a large septarian nodule. It is not like the smaller nodules which are usually closed or have a small opening. Instead, it is basically a calcite geode with many tiny calcite crystals lining the interior of a large cavity. Either way, the guy I purchased it from said that there was still some polishing compound on most of the interior and a simple soap and water wash would clean it up. It looks like there is just dust on the inside, but after many washings I still can't get the stuff off. The cavity is large, but there are many "hills and valleys" in it so I can't really get a toothbrush in there. I am afraid to use any sort of a solvent since I don't know what it will do. Any tips would be greatly appreciated.

28th Aug 2007 14:21 UTCDavid Von Bargen Manager

No solvents are going to work. Might try soaking it in water that has some dish washing detergent in it. Also high pressure water is probably going to be your best bet. Drilling a small hole in a garden hose cap will result in a relatively inexpensive power washer (also a self service car wash might work).

31st Aug 2007 02:13 UTCDon Saathoff Expert

I keep an assortment of round, long-handled, artist's boar-bristle brushes near the "cleaning" sink. The round handle allows you to spin the brush between your fingers. As for solvent, water and mild detergent, as David suggested, is great.

29th Mar 2008 13:44 UTCRock Currier Expert

Jared, One of the little hand held high pressure water guns 'fabric guns' will clean your specimen in less than 30 seconds.

Rock

9th Apr 2008 10:54 UTCMark Rheinberger Expert

Ultra sonic cleaners are pretty good at removing polish from cracks.