I' m with Rob. Scent Killer works great. I was always a little skeptical about those type of products until one day about 5 years ago, I did a test with my father in law. He dip' s skoal, copenhagen, etc...and after putting in a big dip, I sprayed some of it on his fingers....no smell at all. And you know how strong that stuff smells.
I was sold, and have been using it ever since. I' ve never tried the carbon stuff, but I' m not interested in spraying a bunch of black mess all over my clothes, when scent killer is clear and flat out works.