Don't forget that its not just about having a jar that is scent free, its also about having a jar that provides proper storage conditions.
If you go through your tobacco fast it might be alright, but keep in mind that those jars are not meant to provide much of a seal...
In my opinion, it sounds like you've gone through a lot of trouble to try and salvage some jars of questionable utility.
If it works for you then that is fine, but I'd personally prefer something with a guaranteed seal that was food grade and that I didn't have to use heavy chemicals to clean.