Mark help on cobalt cache pot with silver overlay

Very nice quality piece. Dumb dumbs at sale placed the very sticky price sticker right over the dragons whiskers/snout. Took off some of the silver and the patina with it when peeled. Sunshine cloth to silver or leave it alone? I think someone showed a pretty nice silver overlay transformation recently. I’d think it’s a Continental piece but I can’t be sure. Anyone recognize the faint and blurry mark?