"cleaned" is sort of a euphemism. The metal surfaces have been refinished a bit. An abrasive was used on the blade and you can see the grit lines running lengthwise. This is common on refinished blades. Knives weren't made that way at the factory. If you are buying old knives, you will want to learn by example to identify real crocus and glazed finishes. Often refinished blades are misrepresented as new so it is important to know the difference. In addition to the blades, the bolsters and shield have been polished up.... probably by buffing. Buffing bolsters is sort of like polishing off the VIN on you car because you don't like the looks of it. Since buffing bolsters is a finishing step on a parts knife, buffing bolsters creates unnecessary confusion. The original finish has historical value that is appreciated by collectors who preserve old knives. Even on a user, I prefer original finish or normal wear instead of resurfacing. But it seems like lots of folks like to polish old knives and put patina on new knives. Doesn't make much sense to me except if people just want mess with their knives one way or another. Fakers love that novices are compelled to polish knives since their knife sculptures have the same finish--they blend right in. That's an unfiltered ramble.... but I hope it helps