When you say "silver", I think you are referring to the stainless steel ones. Those do not have any plating at all so you don't have to worry about anything rubbing off.
I have a yellow gold and a rose gold Day-Date. Plating is fine (except being a bit thin between the links). If you do end up ever getting a plated watch, just like with gen plated watches like Seiko's, just make sure to wipe them down with a watch cloth after each wear and they will last much longer. Apparently it's the oils and moisture from our wrists/fingers that cause a reaction with the base metals or the plating to wear thin.