After much experimenting, I've found a great deodorant. I started using just a pinch of baking soda and it worked great but the application was messy. Finally I hit on a baking soda and water solution applied with a spray bottle.
I stir a spoonful of baking soda (aluminum free) into a cup of water and pour it into a small (travel size) hairspray bottle. A spritz or two is all you need to keep you smelling great all day. It's amazing how little baking soda it really takes.
I love this for my husband because it's so much nicer not to have nasty waxy deodorant or chemicals in his armpit hair. Much better for snuggling :)