This old fashioned recipe was formulated by the late Clive Wainwright, former deputy keeper of furniture and woodwork at the V&A:

Ingredients
1 part linseed oil
2 parts mentholated spirits
2 parts turpentine
2 parts distilled vinegar

Method
Put all the above into a bottle and shake well.  Apply to furniture – not too much at one time – and rub in well rather than smearing it over the surface.