Hey all, my wife and I saw a Hoover Boys episode where they used a cleaning pencil set purchased from France, I think they're called Andre's Pencils. We followed the link to this website https://www.nettoyervostrouvailles.com and wondered if anyone here has ever used these? A little spendy maybe, but hey I metal detect for fun right? I'd be curious about your results/ thoughts. Certainly I've got enough old crusty coins to give it challenge. 
