I tried nic-a-date, alot. I put it on my head, my chest, I even bought the spray version. I haven't gotten any dates AT ALL. If dates are what you are after, then trust me it won't get you ANY.
It's not good to put on you either, but I've disolved the dates of A FEW nickels with it. Ask cladsmoke about it, he actually uses it to clean some of the dated nickels.