Out detecting for a couple of hours this afternoon after it stopped raining. I hit a sports field which I haven't hunted for at least 20 years. I managed to get coins in each denomination except the 2 dollar coin. I had sent 2 sets of Canadian Coins quite a while ago for Brent Weaver at Garrett to see if he could tweak up the Apex for our difficult to read Canadian coinage. One set was in pristine shape, the other was a set of rusted coinage as shown below. The Apex has it's own program for US coins.
Here are some rusted out coins.....two quarters and a dime. That's what happens to nickel plate on steel coins after they have been in the ground for a while. The Apex, on these coins still gives a strong signal, but it bounces around the VDI of 60-70's -80's. Once you get used to these tones (with practice) it becomes very easy to dig Canadian coins.