Silver pens like the Oppenheim and Gandhi (partly Silver) tarnish rather quickly. MB does have a polishing cloth that does an acceptable job of buffing the pen if it is slightly tarnished. Hoever, once it is a dark tarnish then only a silver polish like Silvo or 3M's Silver polish does a good job. Some say that the latter will eat up the Silver and therefore should not be used at all. Having a dull pen is not an option! Taking it in to MB for a service and polish each time is expensive and inconvenient. Any views, experiences or suggestions?