I've bought a razor on Ebay hoping to have a more economical and comfortable shave, I've got plenty of experience sharpening knives, but no razors. The knife i ordered has some rust and pitting (but nothing close to the cutting edge.) So, can i put it in a rock tumbler, like i have with knife blades with a little crushed walnut? Or does a razor need more elbow grease to protect a more fragile blade?