I have a spot where I have taken out a ton of civil war relics and over 15 half dimes. It was a large campsite. There are several areas where I found a lot of buttons and a few coins, however those areas are full of square nails. Could have been some cabins or huts in this area. Anyway, I have slowed down and found a few more buttons but I can't go much slower. Any ideas on the settings I should use in this area to sniff out the coins which I know are there but the nails are masking them.