They are described as removing rust, grease, grime, asphalt, tar and oil.
Both cleaner listings are labeled unscented (no scent).
Descriptions indicate a spray-and-wipe application: spray the stain or grime, then wipe with a cloth. The rust remover is also described as a simple spray application.
The rust remover explicitly mentions exterior walls, foundations, driveways, and patios as surfaces where it removes stubborn rust stains.