Wear and tear is inevitable with any heavily used mod.
How fast or slow it happens depends on the finish quality and how each person handles his mods.
Some handle their gear with care and some manhandle it.
I guess a good indication of what kind you are is your cellphone, is it all scratched and banged or is it as good as new?
While I don't have experience with this specific mod, I think it may also have to do with body chemistry. I have a rather acidic body chemistry and you can tell how I hold my mods that are not stainless by where the paint is missing (in the pattern of my hand).