I had a can of Kroil for years that worked good, but man that smell just will not go away. My brother needed some penetrating fluid for a mower he was working on, so I gave him the little bit that was left. Bought a can of Liquid Wrench, and it has been working very good, and does not stink like the Kroil.
I used Kroil on some nuts on a strut tower that was inside of my trunk, and it took over a week before the smell toned down inside of the car, and that was leaving the trunk open to air out too.