> On Sep 10, 2018, at 13:19 , Erik Levin via OldTools wrote:
> I have a scraping job coming up-- metal scraping, whereby one uses manual
labour to take, for example, a 55mmX220mm cast iron surface from flat to really,
really flat (though not perfectly smooth). This is the process used for machine
ways on precision machines, lapping plates, and so on. So, out came the bluing
and the scraper. I do not have much technique. Scraping is a serious skill. I
don't do much so I will probably never be better than a competent beginner. I
should take a class, I can get the time and money.
Looks nice. The Old Millrat (RIP) had a great article on this
at Wiktor's site, and I followed it well enough to vastly
improve a Stanley #4 Type 11, and a no-name cast infill. Jim
used a Vixen file and finished with sandpaper, but the scraping
and Prussian Blue was the key.