I'm sure there's a bunch of threads on this (I'll take a link if somebody has a good one here) but for the sake of conversation, who has experience getting great results from coin dips and what were they? The only reason I ask is, I have some old silver dollars that are long gone. They're decent but circulated and weren't stored well. Some are just black. In other words, a dip cant hurt them and can only improve the look of them. I may even try it on a silver ring that could use it. Looking at some options I see there is an E-Zest or a Lindner. Either of these work well? I've tried using acetone before but wasn't that impressed with the result. Any custom, at home mixture that works well or just get the dip?
E-Zest works great. The coin must be dry and you’ll need to wash your hands first. Do a quick dip and rinse for as bout 45 to 60 seconds. The rinse should be under warm running water. Rinse both sides and the edge completely. The rinse is more important than the dip. If the coin is as black as you said, it may require a second dip. If so, wait until the next day. Best wishes.