– No vinegar: 1 cup olive oil and ½ cup of lemon juice.

– With vinegar: ¼ cup olive oil, ¼ cup white distilled vinegar, 20-30 drops lemon essential oil (2 teaspoons lemon juice may be substituted for lemon oil but then must then be stored in refrigerator).

To repair smaller scratches try rubbing a walnut on the scratch

References:
Malin Poche
100 Recettes et Astuces
Maison, Beauté, Bien-être
Marabout
Faire Ses Produits d’Entretien Maison
(250 pages of huge artsy photos)