Rust on the bare cutting edge? Yeah, just sharpen it. If it's a coated blade, and you are rusting through the coating, lots of wd40 or 3-in-1 oil and a stiff toothbrush, along with elbow grease. And kiss the coating good bye.

Good luck.
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-IronRaven

When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.