I would have to say any chemical that can strip gold has got to be fairly aggressive and or dangerous and I don't think I'd be putting my hands in it without chemical resistant gloves.
Cyanide will strip gold plating in seconds but I'd be loathe to suggest its use to people as there are no second chances with it, there is also thiosulphate but I'm not too sure how sucessful that is in recovering gold from plated material, to put it politely if it isn't promoted or heavily discussed here on the forum It's probably rubbish.