You don’t need to use an expensive olive oil for this polish. Inexpensive brands will work just as well and have exactly the same effect.
250ml olive oil
100ml lemon juice
Pour both ingredients into a trigger spray bottle. Amazon have a very cheap selection. Make sure the bottle is labelled clearly and stored out of the reach of children.
To use, shake the bottle well and spray directly onto surface. Buff with a clean, dry cloth and allow to air dry.