A toolroom lathe spindle bearing re-scrape.

Scraping the lathe spindle bearings into alignment to toolroom lathe specification. Part 1 - the lower bearing halves. Not so much a 'How To' certainly a 'How I did'. I have much to learn and lessons to pass on - the white metal / babbit material is like hard butter from the fridge, scratches when you look at it and burrs almost with your finger nail ! So how do you go about scraping the well worn surfaces into alignment and good bearing ? Here is how I have gone about it.
There are lost of videos on YouTube about babbit bearings - most deal with re-pouring new linings, a few show massive surfaces being hand scraped but not much in the way of explanation or the desired outcome, however, there are a couple of videos well worth watching, links will follow in part 2.