You can remove the tarnish with Simichrome. That's one of the "features" of a high carbon steel blade. And, it doesn't hurt anything.
However, to get the pitting involves removing metal. I wouldn't do that. But, it's your knife and not mine.
You have a good knife just like it is. Just remember to wash and hand dry it after each use.
Edited by Dave Davidson (07/16/15 01:46 PM)
Without a sense of urgency, nothing ever happens.
Boy, if I say "sic em", you'd better look for something to bite. Sam Shelley, Rancher Muleshoe Texas 1892-1985 RIP