I've never used lotion for a conditioner, but from time to time I'll use it at work for a mid-day moisture pick me up for a protective style.
I think I'm using Healing Garden right now and it makes my hair smell wonderful!
I do make sure that the lotion doesn't have mineral oil, paraffin, wax or any ingredients that you'd stay away from otherwise.
Seems like I mentioned this years ago to a stylist and she said that it should work because the ph of the hair and skin isn't very different.
Hope that helps!
Take care,
G