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  #1  
Old 02-10-2019, 09:58 PM
RobertM RobertM is offline
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Default How to loosen green encrusted sand on bronze?

This stuff seems like it has actually grown on the coin. It is beach sand and corrosion all glued together and probably harder than the old Chinese coin.
How to loosen it up?
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Old 02-15-2019, 08:39 PM
joe dert joe dert is offline
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Originally Posted by RobertM View post
This stuff seems like it has actually grown on the coin. It is beach sand and corrosion all glued together and probably harder than the old Chinese coin.
How to loosen it up?
If you just want to see what's left of it you can start by soaking it in cheap olive oil..the good virgin olive is less acidic..that can take a while..when the oil turns green you can wash it off with Dawn soap and put it in Zep purple industrial degreaser..that will loosen it even more ..then scrub it with baking soda..repeat as necessary..or go to CLR.. wash off and scrub again..lots of different ways..you can use lemon juice with salt and vinegar..but don't blame me if it gets eaten up.. electrolysis will work too..lots of ways if you are in a hurry and don't care about damaging it..chemicals are hazardous..use in well ventilated areas or get a respirator with chemical cartridges..
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Old 02-20-2019, 05:34 PM
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Jamflicker Jamflicker is offline
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Lemon juice will work but you will loose the patina. Either way the coin is shot.

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Old 02-22-2019, 01:10 AM
joe dert joe dert is offline
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That's your opinion....but not mine
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