2017-11-09_12-05-10 by
Kerry Grubb, on Flickr
Luke, your car looks great! For a comparison here is my car done with BC/CC. I got the paint from Summit, just plain ole black. I did all of the work myself, paint was relatively cheap. Been on there for 6 years and still looks great.
You sound like you know the basics (which is about all I know) so I wont go there. IF it were me (and it was at one time) I would sand to bare metal, just to see whats there if nothing else. Then epoxy, body work, 2k primer, sealer and final paint. I too was going to go single stage not having any experience with bc/cc. I did all of the jamb work, hidden stuff etc with single. It all came out nice. I had enough confidence to do the rest in bc/cc which following the directions to a T was pretty easy.
I have a local mom n pop type auto shop that also sells paint. They are very helpful and will answer any questions I have. I get my clear coat, and tools, sand paper, fillers etc. from them. It would be nice if you had one of these in your area.
As for the paint codes, Wallington is correct, they do not translate to modern paint. Code 19 was starlight black. I used Automotive Touch Up in New Orleans for paint for my TATA, it matched original perfect. They have paint codes to match just about anything. They sell from touch up sticks to gallons.
Like Lukes car, is mine a perfect match to original, I highly doubt it, but honestly to me black is black.
I would not blast the bumpers, easy way to ruin them. I have heard that soda blasting is ok but I would be nervous of that too. I hand stripped mine and used a power sander very easy. Its easy to ruin those in a hurry and they are not easy to find in good shape. I was told that most modern paints have a built in flex agent so what you use on the car should be good for there too, just check with the guy selling you the paint.
Good luck,