On 2/22/2020 7:34 PM, Christopher Tidy wrote:
.... I'm guessing scraping works much better on cast iron than mild
steel. Is that right?

I've never heard of anybody scraping mild steel, but what do I know. My
opinion is that mild steel is not stable enough to hold the precision
that one is scraping for. CRS especially has internal stresses that
would make it unstable.