Tarnishing silver surfaces is a normal chemical reaction and for many collectors visually unproblematic. For cleaning, a common silver-cleaning cloth is suitable, ideally with anti-tarnish protection for longer effect; Montblanc also offers its own silver-care set. To be considered is that every polish removes material, no matter which manufacturer; with vermeil writing instruments, too frequent polishing can wear off the gilding, e.g. on the Oscar Wilde. The natural oxide layer additionally acts as a protective layer that on removal restarts the corrosion process. A sealing with lacquer would be theoretically conceivable but would bring other disadvantages with it.