Just duplicating the post from the marketplace thread:
I always envisioned doing the HOB Neural Bleeders in wrinkle finish black.
This is the paint I found.

After spraying it on, bake it in the oven at 200 degrees.
The instructions on the can say for an hour, but I only let it in for about twenty minutes.
Below are some pictures with notes on what to deburr.



When I assembled it, I used a light, clear grease.
That made it move smoother and a wee bit slower, which is a good thing.
I'll post pictures of the finished prop later, and if I ever sort out video uploading,
maybe a video of it working.