Originally Posted By: SKB
....this is the type of scraping I was referring to.

Steve, that appears to have the tooling marks of scraping, while the original bolt picture looks to be a rotary bit, maybe like rm bill said, a pointed stone.

Can I ask, did you do that? Do you know the whys and what fors of that amount of coverage? Just curious. The machine way scraping I was thinking about just skims high spots on ways and doesn't really show as tooling marks.