Scored Main Cap Bearing - Ouch

Ok so I spoke about another short block that I have with forged pistons (TRW 10:1). It was running but smoking when I pulled it. The X heads were pulled and installed on this mtr in the car after rebuilt and ported. I would rather rebuild the forged motor and have it ready to go in when this one is pulled. I have always had the shortblocks rebuilt but I really dont want to do that anymore and I feel like I am talented enough to build one. So once the other mtr is apart what is the rebuild sequence of cleaning and what machine work should be done or checks (no short cuts, thanks John and all). It has no ring ridge so until I get the pistons out I wont know if there is any damage on the cyl walls. I found out the shop that did my shortblock in the car did not have a boil tank, so besides me with the long bolts I feel they are the problem for the trash. Once apart is the first step to have a shop boil and clean or do they boil and I clean? So far you all have given me good advice and I'm willing to suck it up after finding the metal last night. The oil looks like metallic dark brown paint. Can you all take me step by step and I will buy any tools I dont have (which would be mostly micrometers, I have dial indicators and calipers). I dont want to go through this again and I will sell the damaged shortblock to help finance the new one. Any idea what I should ask for it? Thanks again to all that has posted.