- Joined
- Aug 31, 2013
- Messages
- 3,197
On all but one of the blades I've found them on the zig-zags looked to have been done after the the blade was milled. On a buddy's Ratmandu the mark was interupted by the primary grind.I know it's not about making the coating adhere. It just looks like someone is quickly running a grinder across the flats, and we don't know why.