Wow thats really cool. I need to see if I took my granparents papers from my home when I left. They had the same sort of stuff. Thanks for posting this.
I tried to do this. Stuff changes too much for me to keep track. Beyond the properly mating of the receivers, there are aesthetic issues where some uppers and lowers wont look good together. If someone wants to champion this we can sticky it.
If I like the results I think Cerakote will have some good applications at my day job. We have a very accurate oven. Im in charge of maintenance. I could very well see the use of a blasting cabinet and the ability to coat some of the machine parts. ;D