Quote Originally Posted by adrspach View Post
I remember many hours of watching my friends dad peening them. Could not get my head arround maturing new blades burried in manure.
To return back to the original hone. I had few simmilar in my hand and they looked and felt like ceramic manmade material, simmilar to material used for old school fuse housings.
I understand peening the blades, but why were new blades buried in manure? How were they "matured" in manure?