I've used a furniture wax/polish that I thought was safe but a query from my wife about the smell made me research the products ingredients.
It contains turpentine between 10-30% which according to wikipedia is very toxic by inhalation. The jar itself says nothing about it being dangerous other than can sensitise the skin and flammable. The crazy thing is I stopped using spary polish because I thought that was dangerous and looked for a more natural beeswax paste and purchased this product because the only danger I could see was that it was flammable.
I've used it about 3 times but my worries concern a 3 month old baby and the potential for damage to the central nervous system. She seems fine I'm still very angry with myself for using it.