I just completed these nuclear parts today, and I got to clean and ship them out!
The pieces were a bit more complicated than my boss initially quoted them at, so the time was a little longer than was expected; however, each part is within spec and before the deadline. There were a few close calls due to some unconventional workholding setups that the client required to get 0.0003" tolerances, which is slightly higher than what Haas is built for.
For the cleaning process, I gave each part a good swishing around in hot-soapy water, then rinsed in water, and finally cleaned thoroughly with alcohol to remove any remaining grit on the parts! The application for these parts requires an extensive cleaning, which is only what we do before it gets sent off to another facility to get deep cleaned.
All in all, I learned some new techniques to get almost spot-on accuracy by releasing the material of bulk of the material, letting it rest, then coming back in again to finish the surfaces. It's amazing to see how big a difference in the room's relative temperature will affect the size and shape of the part!