I first discovered vapour blasting 40 years ago as a process for cleaning parts of plastics injection mould tools, cores, plattens, extrusion screws etc, etc.
At the time I was building an Ariel Red Hunter, and used the vapour blaster to prep all the alloy parts. I still have that bike, and the alloy still looks fresh today.
Now, Mikey, you have mentioned before, as have others, the extra washing required in order to ensure oilways etc are REALLY clean and free from glass beads/media.
I have used ultrasonic cleaning in order to achieve this.
What is your plan for the additional washing stage(s)?