To defeat the smelliest stuff on Earth with another smell, I would have to come up with a smellier thing. I don't really want to be embroiled in a stench arms race.
The least stinky propane I've found is RiverTrail branded propane in a can similar to a Coleman can. Try your Home Hardware. I'm not sure if their bottler may have changed their odourant though. Coleman used to be the least odourifous, but that changed a few years ago.
HCl to wash your hands?! The molecule looks like a little doggy. Maybe it can be coaxed away with a piece of liver. Can it be solvated in something less nasty like Varsol or ethanol?
Want nearly free GBB gas?