They look good.
You got a good way to complete the process with a drip/soak to clean all the passages??
I have an ultrasonic cleaner (fairly good sized) to clean out passages in carbs and other parts, followed by a water rinse and compressed air dry.
hey wannabridin does this process just clean the surface of the items.
I have a couple of points covers that I cast where i have to sand down some areas but others are untouched.
I want to bring the sanded areas back to the original cast look before I sanded.
This process does not effect the surface of the parts in any measurable way. Maybe some lightly adhered burrs will be removed, but largely the surface is a bit smoother (honed) but otherwise all surface level imperfections (casting marks, pitting, etc.) will remain. If you want to maintain a cast look but have the surface brightened up a bit, this will likely be perfect! If you'd like, feel free to send a sample part to me and i'll test blast it. If you like it, I can keep working, otherwise I'll send it back to you.