Scored Main Cap Bearing - Ouch
What’s your tool of choice for doing this
I'd depends. If it's going out to be ground I use a...well...now I have to go out and look but IIRC its a 1/2 double cut round burr, and then it hit the finished chamfer 60 and then 120 grit paper rolls and send it to the grinder.
If the crank is done, I have some 1/2 round stones (aluminum oxide IIRC) that I use and stone them.
The stones can take double the time but as you know, you have much less chance of scratching the crank because they aren't so grabby.
Edit: I have 3.79 crank out there for my W2 junker I'm going to do. I was going to turn the rod throws to 2.100 and use a 6.250 Chevy rod so I can use an off the shelf piston for a 4 inch stroke with a 6.123 rod, but I scratched that idea because everything I'm finding in off the shelf Pistons has 1/16 1/16 3/16 ring packs and I want .043 .043 1/8 so I'm just going to use it and it needs the oil holes chamfered.