I don't have any soaps/aftershaves that I've done that with. However, I do love "the one gentleman" by dolce and gabbana.
They stopped making it about 8 years ago, and the only place I could find it was this website that sells cologne samples. So the only bottle I have only contains 1 oz or so. So I'm basically treating the stuff like it's gold, because who knows when I will find more.