Removes accumulated dirt, old wax, stains, glass marks etc. on waxed and varnished furniture. The Heavy-duty deep cleaner evens out the colour and restores the original sheen, thereby avoiding stripping. The Heavy-duty deep cleaner does not work on varnish that is less than 40 years old. Which Heavy-duty deep cleaner should be used? Use Light wood cleaner on light oak, beech, pine etc. Use Fruit wood cleaner on cherry, mahogany etc. Use Dark wood cleaner on dark oak, dark walnut etc.