Are you going to match-lap them or scrape them individually?
Ya KNOW... I don't know what materials you'd use for this, but if you could pour cast iron onto some dense liquid with higher mp than iron, you could make float iron and have a crazy flat surface (bar thermal distortion as it cools, I guess...)
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Ya KNOW... I don't know what materials you'd use for this, but if you could pour cast iron onto some dense liquid with higher mp than iron, you could make float iron and have a crazy flat surface (bar thermal distortion as it cools, I guess...)