If you are looking for a home remedy for nail fungus and have a jar of Vicks Vaporub around, you might want to give it a try. I have not used this myself, but remember reading that this is a possible fingernail fungus treatment.
There is something about the eucalyptus that helps treat the fungus. I think it would be worth a try, and I don't see how it could hurt you in any way. Even though this is not why Vicks was made, many times there are multiple uses for a product.