The best way is to take/ship it to a gun shop that does reblueing. Expect to pay about $150 though, so its your call as to how bad you want it.
The next best way is to get some cold blue for less than $10 and see if thats good enough. If you do it right it looks pretty good and as long as it isn't somewhere where you grab it a lot, it lasts a decent amount of time, but not as good as hot bluing.
There is no such thing as a stupid question, only stupid people.