Made grapefruit soap
EO enthusiasts will surely weigh in here, but I have been doing some research into them as I want to start using more of them in my soaps. I am so addicted to my FOs, but I want to try fragrancing with the naturals a bit more. I am sure I have read in more than one place that grapefruit EO does stick way better than the orange or lemon ones. Also, I think that adding the peel will help anchor it too. I made a soap over a year ago and added dried orange peel for exfoliating. I don't think I used enough because it was not exfoliating enough...but WOW...did that scent ever stick. Of course, it was one that I rather wished had faded away but it is still strong after such a long time. Even the bar that I still have sitting out in the bathroom. So, I think you will be ok. If the lye is going to eat it that will probably happen in the gel stage and very early cure. Good luck.
rita