That being said, wiping your instrument down with a soft cloth with perhaps a bit of Windex sprayed on to help should be all that you need most of the time.
Regardless of what most silver polishes say about being "non abrasive", you have to understand that when used in this context, "abrasive" is a term of art. Almost all polishes contain something that's harder (on the Mohs scale) than silver metal, even if it's just rouge. As such, a small amount of metal will be removed each time you use a silver polish. And there isn't much silver nowadays on a silverplated instrument. You do the math.
It's probably a good idea to use polish on your instrument only for special occasions where appearance is important. And I think we all have an over-inflated idea of our appearance...
