I like it. I’d love to be able to jump into a dumpster or something to escape from a zombie horde. That ought to hide you pretty well from both scent and sight. And having shit jump out at you from inside a trash can, closet, etc, would be awesome as well.
Cover scents should also be a thing. Hunters use them all the time to hide their smell from deer and other animals. Strong odors should cover up the smell of human from zombies and other creatures. Gasoline, ammonia, and similar compounds should work pretty well. I think there are a few herbal extracts and aromatic compounds that might work well too, if you had enough of it. Peppermint or vanilla for example.
On top of that, pouring the stuff on the ground or throwing a breakable container filled with it should help disperse your scent trail, and throw off anything that is tracking you that way.