Caster Oil is well known to help you go to the bathroom, a form of laxative and skin agent. Olive oil, is used for cooking and salad dressings, but believe it or not, I use it to clean and shine our stainless steel appliances.
We have 2 refrigerators; Samsung and Kenmore and both fridge after buffing them with either olive oil or castor oil, they looked amazingly shiny.
The difference in color and shine is shown on the image above on the freezer door. If you noticed, the bottom is not buffed with the oil and you can see the difference. Plus, it gives it a little protection from fingerprints.