Looking at getting come So2Pure to try on my wife's friends car as she quit smoking about 3 months ago and is trying to get the smell completely out of her car. From what I've read this should do the trick. The question I have is, will how much will the 120ml bottle cover. She has a medium size sedan but I would also like to use some on my sons car as he's got the smelly gym clothes smell in his car from always having his sweaty clothes in his car when he's done with football or basketball practice.