Oily Coins? - Coin Community Forum

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Author	Replies: 5 / Views: 1,412
chrsmat71 Pillar of the Community United States 4973 Posts	Posted 05/27/2012 4:32 pm hi all, I've ran into a few uncleaned coins from the same batch that seem to have an oily tar-like grime on them. it just looks like the usual coin grime but when I pull them out of their distilled water bath they have a weird feel, and if I look carefully at the coin, I can actually see little beads of water forming (like on a newly waxed car). a total bugger to get off. on a cull I tried some degreasing agents (tire cleaner!) and it came off pretty good. any idea why these coins would have tarish stuff on them? any idea on how to clean it? just curious. Edited by chrsmat71 05/27/2012 4:39 pm Report this Post to the Staff

jessvc1 Pillar of the Community United States 2596 Posts	Posted 05/27/2012 4:38 pm That's easy to explain... Some roman dude (with his money bags)was out hunting a tyrannis sauris rex and totally fell in a tar pit man! Report this Post to the Staff
jessvc1 Pillar of the Community United States 2596 Posts	Posted 05/27/2012 4:48 pm Did you try some dish soap? Maybe that would take off the grease. I've noticed this before on several uncleaned coins that I ended up using electrolysis on so I couldn't help you on this. Acetone takes off tar on modern coins. Report this Post to the Staff
echizento Moderator United States 23731 Posts	Posted 05/27/2012 4:50 pm Sounds like RENWAX. A hot water soak or some acetone should remove the wax. Report this Post to the Staff
dougsmit Pillar of the Community United States 1549 Posts	Posted 05/27/2012 5:03 pm Another possibility is that the coins were soaked in (olive) oil or another solvent as part of cleaning but not finished. I also avoid coins with a greasy, thick covering. Report this Post to the Staff
chrsmat71 Pillar of the Community United States 4973 Posts	Posted 05/27/2012 5:06 pm lol! I was curious is some guy fell in a tar pit. i did try dish soap, doesn't budge it. I don't think its remwax or anything similar, it very dark and grimey looking. weird stuff. that could be dougsmit, it could be merged grime and some type of oily solvent. I did notice one looked scratched, like someone had tried to test the metal or someithing. Edited by chrsmat71 05/27/2012 5:08 pm Report this Post to the Staff
	Replies: 5 / Views: 1,412

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