I polish all my metal snares and chrome hardware with turtle wax, chrome polish? Do you think that will work? They look great and I really haven't had pitting but I do notice that I need to polish them up a little every now and then. Makes me want to collect more wood drums, less polishing.
I use chrome polish to clean mine (not that it gets played out much anymore....I save it for special occasions now) and then coat it with a coat of carnuba car wax. It does help keep it from tarnishing and the possibility of pitting. I think mine was used every weekend for 35 years by my dad before it was left to me in his will. He sidelined it for a limited edition african satinwood classic maple snare around 1996, but from 1968 to that point it was used every weekend. And it still has almost no pitting....one or two very minor ones if any. The man always took care of his drums.....his hardware took a beating over the years though.....I can't count the number of and different brands of stands/pedals he went through over the years....although his main go-to pedal for years was a Ghost. I remember the day it broke on him.....he was heartbroken! He couldn't get another one new as they were discontinued by the time this happened, the internet wasn't around yet, so there was no such thing as Ebay......yep, you guessed it was the mid-1980's!
Ooops....there I go again.....sorry bout that...LoLoLoLo
Anyway, carnuba wax to protect it is the way to go.....