Use internally to help with seasonal respiratory illness.* Lemon oil benefits: Can be used as an air freshener to lift your mood and energy levels and freshen the air. What does lemon oil do? Lemon oil can be a great solution for preventing tarnish (in its early stages) on silver and other metals. How to use lemon oil: Add lemon oil to a spray bottle to clean tables, counters and other surfaces. Lemon oil also makes a great furniture polish. Simply add a few drops to olive oil to clean, protect and shine wooden surfaces. Use a cloth dipped in Lemon oil to protect your leather furniture and other leather surfaces or clothing and make them look more vibrant.