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Originally Posted by Ian

Hi Detlef:

I've not seen blood stains on a blade survive a good polish and etch before. Generally these are the same as rust. If you take the surface off, then the stain should not return.

Instead of fingerprints I think the marks may be "chatter" arising from grinding of the blade. If you look at the close up pictures of the brass, you can see residual lines from grinding also. A little persistent rust within the grooves on the blade would lead to a recurring pattern on re-etching. Removing more metal would likely solve the problem.

Hi Ian,

agree with you, it look clearly like rust. My first thought have been that the prints are from touching the blade after neutralization with etching solution. After receiving the sword I've tried to polish away the "print" on one side with steel wool without success. I think that I have to living with it.

Regards,
Detlef