Looking back at my notes, scraping in that bearing took something like the equivalent of a full day's work. For the most part I used a Moore & Wright triangular scraper with occasional
use of a small bearing scraper inherited from, and I think made by, made by my father-in-law. I only scraped the split bearing, the others were lapped. I was not going to risk reaming them. While scraping should give good oil retention, my primary concern was getting an accurate fit. I was rewarded with crankshaft that, when lubricated, fitted without play yet would turn under its own weight.