OK, I'm finally finished with the parts. I'm not sure if they are done but I am definitely finished!
After the last sanding and filling primer round I hit them with some plain grey primer and then with a few coats of gloss clear. They look surprisingly good and I'm sure will produce excellent castings. I'm going to start with the 2 easier parts and see how the process goes. Once we get it worked out I'll move on to the next 2 parts that have a bit more complex geometry, especially the large part which may freak them out a bit due to its size.
I'm going to drop it off at my jeweler buddy's business on Monday and he'll see what the moldmakers say to doing such a large piece. They usually deal with ring sized parts with a bracelet every now and then. The molds look like these shown below.
That's all for now.