My White's detector has the capability of turning off the high sensitivity setting which allows me to get right next to metal and still detect objects. They sound different than normal but I have found a lot of good finds next to metal fences and playground equipment. One was a Mercury dime about an inch from a playground pole in Chickasha. One was a large gold ring in Yukon at a school fencerow. One was a Kennedy 76 commemorative 50 cent piece in Loyal next to a metal building.
Using a small sharpshooting coil helps a lot too.
The thing that really amazes me is the unusual finds in the unusual locations.
How does a perfect condition English Two Pound coin end up in a sandlot school playground in Wichita?
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Show and Tell. Found about 2 dozen foreign coins at my grandkids school on the playground.