Been learning to scrape over the last month or so, I bought the Sandvik carbide thing in the photo. I also made an HSS 'pull' scraper but I'm struggling to get results with that one.
I've spent about 8 or 9 hours practicing on cast iron and some cast steel and I've got to the point where I can achieve the sort of effect below quite easily.
Problem is I can't seem to get it any better! Spent an hour tonight making this piece in turn worse, then back to below, then worse again, but never better. Just pushing the blue around.
Is this because the Sandvik scraper blade has a large radius (I guess it's about 6 inches)? Or am I just being careless?
I have bought a diamond wheel on which to re-profile one side of the insert if required. Thusfar I haven't blunted all 4 edges so still have sharp ones available for now.
I'd just like to get the spots smaller and a more even distribution - you can see there are patches where the density is real low.
Would appreciate any advice.