As usual, I've failed to properly convey my thoughts.
First, Cerakote is not powder coating, it is a wet film ceramic coating that must be fired to cure. There are DIY pretenders, but none as effective or durable. If you were around in the 70's and were of the mechanically afflicted, you may have seen headers or other parts subjected to high heat, coated with Jet Hot, it was the precursor to Cerakote but was a dip thin film ceramic coating rather than a spray application which was originally developed to protect jet engine exhaust nozzles from corrosion due to extend runs of their afterburner.
Be all that as it may, there is a very specific prohibition of any firearms discussion on the open portion of this forum, and I did not want to run afoul of that rule by saying Cerakote has proved both effective at preventing rust on ferrous metals and being extremely wear and heat resistant, on those items. Without getting too far afield I can attest to Cerakoted charging handles with thousands of strokes on them and not enough loss in coating thickness to be notable. Hopefully, this clears any misconceptions I may have fostered with my attempt to stay within TB rules.
And BTW, run some sacrificial screws into those threaded holes before powder coating, then use a razor blade to cut the paint on the screw flush with the surface it's run in before removing it to avoid any paint chipping or clogged threads.