New Zealand Gold Prospecting & Metal Detecting Forums Archive

The forum has moved to community.paydirt.co.nz, see you there!

This forum is now an archive to preserve the knowledge and finds posted here.

1864hatter		Posted : Thursday, 5 July 2012 1:12:04 PM(UTC)
Rank: Gold Ingot Groups: Registered Joined: 4/08/2010(UTC) Posts: 1,007 Location: Auckland.... Thanks: 49 times Was thanked: 566 time(s) in 269 post(s)		Yesterday I went to a new spot which produced 60ish coins for me. I also had the good fortune of finding 7 silver coins two of which were Half crowns (34 and 43). The downside was that almost all the coins I got were heavily corroded. Im not worried about the no silver ones but I would have liked to clean up the silvers abit. So I decided to put them in a pot with a little water and a heap of baking powder. After boiling them for a minute or two the water got really dirty and the coins came up great, well compared to what they were previously. It's well worth a try. One more thing tho, the silver coins were black and crusty but they werent pitted or anything so Im not claiming I can fix that!
		And now....On sandy beaches and muddy soil, rings and coins await my coil!

oroplata		Posted : Thursday, 5 July 2012 1:30:55 PM(UTC)
Rank: Gold Ingot Groups: Registered, Moderators Joined: 16/06/2011(UTC) Posts: 1,040 Location: Christchurch Thanks: 23 times Was thanked: 211 time(s) in 152 post(s)		Was it baking POWDER or baking SODA?
		WWW

1864hatter		Posted : Thursday, 5 July 2012 1:40:01 PM(UTC)
Rank: Gold Ingot Groups: Registered Joined: 4/08/2010(UTC) Posts: 1,007 Location: Auckland.... Thanks: 49 times Was thanked: 566 time(s) in 269 post(s)		Powder
		And now....On sandy beaches and muddy soil, rings and coins await my coil!

Metal Kiwi		Posted : Thursday, 5 July 2012 1:57:48 PM(UTC)
Rank: Gold Ingot Groups: Registered Joined: 19/06/2011(UTC) Posts: 1,210 Location: Auckland Thanks: 498 times Was thanked: 484 time(s) in 322 post(s)		Originally Posted by: 1864hatter Yesterday I went to a new spot which produced 60ish coins for me. I also had the good fortune of finding 7 silver coins two of which were Half crowns (34 and 43). The downside was that almost all the coins I got were heavily corroded. Im not worried about the no silver ones but I would have liked to clean up the silvers abit. So I decided to put them in a pot with a little water and a heap of baking powder. After boiling them for a minute or two the water got really dirty and the coins came up great, well compared to what they were previously. It's well worth a try. One more thing tho, the silver coins were black and crusty but they werent pitted or anything so Im not claiming I can fix that! Was your pot aluminium or stainless steel? If aluminium then the reaction would be the same as the tinfoil, hot water and baking powder method which I have found is OK sometimes. If stainless then I will try that too.
		WWW BLOG

1864hatter		Posted : Thursday, 5 July 2012 3:23:29 PM(UTC)
Rank: Gold Ingot Groups: Registered Joined: 4/08/2010(UTC) Posts: 1,007 Location: Auckland.... Thanks: 49 times Was thanked: 566 time(s) in 269 post(s)		pot was stainless
		And now....On sandy beaches and muddy soil, rings and coins await my coil!